Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c414bdb78636d4…

MALICIOUS

PDF

79.2 KB Created: 2021-08-08 00:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5c6e78c0b7ad59547dadd4f2499f1e9c SHA-1: 8f818767791c4c295558765e6037477ebd8da320 SHA-256: 70c414bdb78636d4c70bc2c9fbe859de930d8123d9f58df33361e7e4805df2d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2c0f6a9de9792760cae5f6eeb5db61a6/58815947188.pdf In PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607edd37201b9---tebewevuvelodug.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/6935d321f564ec8c36c0cff77af8a7e4/82950921543.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608191847750a---61457395142.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/67932399649.pdfIn PDF document text
    • http://grupahatak.pl/admin/_fck_files/file/75487669602.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/jagifefom.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/9313b31dae67a31cf1cb6369e87e317b/96237579674.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/6716363367.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7099ed28b---31138886837.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/towemowekoraxo.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/51097374373.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/juvigixe.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/75147092675.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb037a53c0---76325057967.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071380dbb389---dudotaxowon.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/nuwuparunexikufililefon.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/fixupunidora.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b46f865accfe9c3a7fe3904d1d4d9b9e/vuvikelomif.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/xiluved.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/4e2540132d68d473cddf340d818406fb/58423442551.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/54765999920.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/xerasuno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=farewell+speech+for+principal+by+teacher+in+hindiPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD230 15564 bytes
SHA-256: 3015abadfad9058b610b3b3b8fed53013dedba60838dcc342789a87c63529e73
font_01_sfnt_off0000fa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 11036 bytes
SHA-256: 01e3bd1f7e4769e484a8bc2e5a8ad2de0f2b7bcce60e8755cce44deff11706c9
font_02_sfnt_off0001138e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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