Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ca878855eac492…

MALICIOUS

PDF

93.6 KB Created: 2021-03-08 16:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cc1f6c93e2cfd85564cec62a5e6ab884 SHA-1: d7659b506e605f9aef3c7faa31839b1202136ae6 SHA-256: e2ca878855eac4920e190a1d8a5d8644ac53621417329afe15405411f53d6c34
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=find+the+inverse+of+a+linear+function+worksheet PDF link annotation
    • http://limavirom.22web.org/malachi_martin_los_jesuitas.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/jdjahg8/lodinesugefutoja.pdfIn PDF document text
    • https://cdn.sqhk.co/sadinuko/hcifjTy/depezuvesudu.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/ehelZ5v/nocrop_photo_editor_square_pic_square_fitted.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5fd0acba9c811.pdfIn PDF document text
    • http://xemolitaxixa.22web.org/79640907289.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/Ejhg4z8/vedabubexaxovinevikepaw.pdfIn PDF document text
    • http://uscreditmonitoring.info/hootsuite_free_windowsqgfn2.pdfIn PDF document text
    • http://bunnygummy.ru/3015932073335rxl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457332/normal_5fdb519cb672f.pdfIn PDF document text
    • http://petajofap.22web.org/racconti_brevi_in_italiano_per_stranieri.pdfIn PDF document text
    • http://xapepinozex.22web.org/envision_math_grade_3_answer_key.pdfIn PDF document text
    • http://hookup153.online/daponabenarokudogizabpbewc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_6014272fc4c9a.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/idieysP/54152193067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugadavax.epizy.com/ottlite_assembly_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/fazosibuzadimorugiz.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/is_it_illegal_to_be_married_to_two_wives.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/38533350084.pdfIn PDF document text
    • http://duvujod.rf.gd/wugidosibowux.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://scripts.sil.org/OFLIn 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_off00011da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA9 5280 bytes
SHA-256: 0df0b28a202dea9e865ad8219c1ff6bee221a0b1e69cd2a5964845e4563960b2
font_01_sfnt_off00012fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAD 10348 bytes
SHA-256: 1098777fecffb96ee4240e2d4877db31e43d471c114ebb93468da39e033e9d77
font_02_sfnt_off00015353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15353 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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