Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4f30eb3ca21c1a…

MALICIOUS

PDF

79.0 KB Created: 2021-03-29 03:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8d0bafb2fb7a74d0c46069379a7514ce SHA-1: 2d79dc1aa50d2aad6d604e44a0619b3391702077 SHA-256: 5b4f30eb3ca21c1ae27a7f362c11f12ed6cab703c9823576d0315586164dc914
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=is+the+ford+4.0+v6+a+good+engine PDF link annotation
    • https://nidozasa.weebly.com/uploads/1/3/4/6/134680612/nomotikepuz_pikot_mosat.pdfIn PDF document text
    • https://xoxawipexari.weebly.com/uploads/1/3/0/7/130775732/9655504.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/sujoduzu_pozumofuwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_605fd63fe5a05.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/kojafur_xebiluga.pdfIn PDF document text
    • https://xetuvamabur.weebly.com/uploads/1/3/1/4/131409037/2249652.pdfIn PDF document text
    • https://juzubuju.weebly.com/uploads/1/3/4/7/134703155/4929147.pdfIn PDF document text
    • https://vomalokigalexa.weebly.com/uploads/1/3/4/3/134329787/4915217.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/85e70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_600e9f122e329.pdfIn PDF document text
    • https://fefaxunitu.weebly.com/uploads/1/3/4/3/134399706/eb763e8e57ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_5fd1a866cd466.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/vanututuk-wibamorinozuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/appvalley_for_android_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/kofedeguferaxulenopoza.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/context_clues_worksheets_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/89110615164.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/miropafetuwofisavukebopiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/enactment_meaning_in_blacks_law_dictionary.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

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_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 5340 bytes
SHA-256: 6bfd553d26956366de9c2fc37f04137d451bd824a71f6b22143e4c6cb5bd29bc
font_01_sfnt_off0000fdb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB8 10244 bytes
SHA-256: 2074c64a874d0d078385e4a90a9701533f25caa345938e34c544816a5658515c
font_02_sfnt_off000120d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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