Malicious PDF — malware analysis report

Static analysis result for SHA-256 317c103f20548805…

MALICIOUS

PDF

91.8 KB Created: 2021-08-19 20:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a474123d85f1c7875daa2fd74ac52b43 SHA-1: 46a649f587897557927afa134d98b7cea03d26d3 SHA-256: 317c103f20548805e6ff059ea52e2d804e3ce0611cae8f72df1bf91e014e8317
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing and trojan delivery mechanism. It contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute further malicious content. The document's content, indicated by heuristics, likely includes urgency lures and visual download buttons, combined with a critical finding of requesting recovery secrets, all pointing towards a social engineering attack to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611290edd7e73---46135416827.pdf In PDF document text
    • http://whatdwellswithin.com/file/segikigevukivatevesofix.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/rqn2iuusrfip0cm7vqsioku367/muzutukazijukoduxosoxav.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/xirezukid.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e4c262f4a---35927791113.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/30689307377.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8da8c66ce---89560780620.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/70587192142.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/nexewekuj.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e3f7e9b36---827501041.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/zuwinodedoxonaf.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079603f17810---85616677895.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a4607cbe9c3---23287584135.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c51171f20---zofotenugez.pdfIn PDF document text
    • http://zenithmetals.com/files/kexusok.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/85428649557.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/daguturilubitomalidatep.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b92a447b9b6---21908924975.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160776803873b2---46924165489.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/sasemivejixolepazufo.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab958c6ef47---71495118961.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/86f443ed8a6b7a4fa03f6dda0fd61c12/zelanipawapobileju.pdfIn PDF document text
    • http://macphersonproperties.com/clients/876251/File/tufavukowakuni.pdfIn PDF document text
    • http://teknis.it/userfiles/files/sufesigafo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=mega+mining+cloud+bitcoin+mining+platform+apk+free+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E6 11204 bytes
SHA-256: b73ecfb8263dc71120cbc69c818baec3636d00d15c88c770f6019ac227c78546
font_01_sfnt_off00011ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136CE 16268 bytes
SHA-256: 7e4273e646d527ea798cade164a0693e9f365012880872f30e8cf9e60517fea0

Open this report in the interactive analyzer, or submit your own file for analysis.