Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f2d7c00a1a348a…

MALICIOUS

PDF

88.6 KB Created: 2021-09-01 12:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 75563be4265ee5c3b804bcc8dbc9d2df SHA-1: 3c7c7d57ca8dcd79882771f44bd6bd68e4730d98 SHA-256: e6f2d7c00a1a348acd88f5ca95dc6867d9df8ed9d4f084c8ea7c4c865ba3602f
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress sites and other domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://www.yoko-ono.be/images/userfiles/file/tesikojaniwebevegu.pdf In PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/a3eccd14724637bacca162d2b0e28f1a/lewowikuwududir.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7c0f20c81---7358938077.pdfIn PDF document text
    • http://fruitvita.com/files/files/mapifoxezujadulibaz.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/nolinifiruralog.pdfIn PDF document text
    • http://gerocuki.hu/user/file/13565490398.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/18b8983fc01dbe65d80253aca4ffe39c/85445068066.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/96642945076.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/99011684799.pdfIn PDF document text
    • http://ibb-online.ru/f/file/16047455858.pdfIn PDF document text
    • http://radfordhsclassof1970.com/clients/878146/File/vugofezisi.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/zexewunekaj.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/787f8379fa93fe33c26cb4000866c0fe/72877516873.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/84450492867.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/fupopodidakukukavexo.pdfIn PDF document text
    • http://thecountryclub32055.com/userimages/norosavumamuxax.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/4c25c9d68f0d5857f116ed26c4efae79/63355568304.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/80264556624.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/xomupezok.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/t3vjdfcfu6784jlfp1hs1ecibq/fimusuridopogad.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e903cc94c09---papulubalaranebevu.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e4a6e79c9863cbe5b0fd99697d0c2e28/98831492697.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/ae4d4848c6fff0196f743ec0fa93556d/9446876988.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/5ba09e5cd0371421c9dc043ef4223bbf/27808499178.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/dakunefog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=matthew+mcconaughey+the+paperboyPDF 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_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF4 18192 bytes
SHA-256: 24eeff5c6267d6018ff55048c73581ed64013eb8f9e9b4782e7aeb75faa4ff81
font_02_sfnt_off00013b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B53 10948 bytes
SHA-256: 771316f89de9d74bb6822e0c430624520291594bb2de4d5b40f4e6b379ddec53