Malicious PDF — malware analysis report

Static analysis result for SHA-256 847ace2bf8987e17…

MALICIOUS

PDF

85.1 KB Created: 2021-09-01 23:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 91d367bf4fb6e090d079596bcbe7b528 SHA-1: 5ddd24d0763999b7679edd58ba91956b83bbea07 SHA-256: 847ace2bf8987e17aced60b9608012b6ca4e36aa56cc1a45e8c297f4e1bf311b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs, many of which point to potentially compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The heuristics indicate a "Password-protected archive handoff" lure and an "Urgency / deadline lure", which are common tactics in phishing campaigns. The ML classifier strongly flagged this PDF as malicious, and ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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://allytemp.ru/uplcv?utm_term=simple+scanner+pro PDF link annotation
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/fabesipixukofok.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/67774388609.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kawoz.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/18754621356.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/fimibufadasitatimawev.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/bujatu.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/magazilovilurexafitudo.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/95671348824.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/dugoxanipulelagipuwilibu.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7182097c56---64087516480.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c429e237452---72577351057.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/88708529942.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/rugopobofotizofajeramofip.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/seliripumox.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607593e8ccbf9---44958729911.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a522a852fca---mimugigafose.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/totadaxovijanubodi.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abfefee402d---vojijapidisukimepuvovej.pdfIn PDF document text
    • http://asfcursillo.com/clients/879797/File/jezunuposokulis.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/karofogudiguw.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/nefemoto.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/92342cc0a0711e6517c2638aa3d9a898/tusavutesageratajiguna.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/617ba5688ba888945c9baac4e682c6bc/84546053858.pdfIn PDF document text
    • 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_off0000e4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AB 18704 bytes
SHA-256: 469d7cda27ab73f324ce85b300c2e629cb6b85da60cd2a01575a24673527b958
font_01_sfnt_off0001162a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E41 10512 bytes
SHA-256: 22e7901de6476f575576c0b735eb4c460efd4fc801d9b26a2f190fb6aa255022

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