Malicious PDF — malware analysis report

Static analysis result for SHA-256 22da829284940b68…

MALICIOUS

PDF

79.6 KB Created: 2021-04-08 08:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 28d5c8591260e5336ac67f54043a1a13 SHA-1: 814bfe92e1b229a70827c6af14d034838e148155 SHA-256: 22da829284940b68afd5f067f00b6272f5753c3ae18dd6b1ee9b8acb03cfd75e
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 0.9998

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://ponafet.ru/wix?keyword=csr+racing+2+mod+apk+mobile+apk PDF link annotation
    • http://exemplpusj.com/anita_desai_fasting_feastingegcxz.pdfIn PDF document text
    • http://thechambre.xyz/412701429904pqxm.pdfIn PDF document text
    • http://1ux.site/92537702256r9c03.pdfIn PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/59da3df4.pdfIn PDF document text
    • http://businessoutsourcing.info/275382936584ohn8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_604027e32bf91.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/sogajumipemajegjeoo.pdfIn PDF document text
    • http://umkatrade.ru/fesiwajerop32zqq.pdfIn PDF document text
    • http://herss.space/can_you_use_whey_protein_as_meal_replacemente9q2x.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/gilitumejozo_polikavu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367294/normal_5ff283d14d20d.pdfIn PDF document text
    • https://xusudunegowubub.weebly.com/uploads/1/3/0/7/130739081/18581dd77250.pdfIn PDF document text
    • http://tevfikyuce.xyz/215368750981z0v5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c16385f-8db2-4eef-8c77-f80810e29acc/the_westing_game_book_chapters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0617665b-6fb2-44c6-977c-924fec466687/15934989161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ee5239-086f-45b9-87fa-aed5ecfd2f99/korean_study_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/sepumaso.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/83581262529.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/5039585735.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/biology_corner_worksheets_analyzing_data.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF951 5632 bytes
SHA-256: b3310d85615b38c3a3e87c678b4305e55f0abf6693ed8f6eeb3fa090f9fea234
font_01_sfnt_off00010c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C59 10892 bytes
SHA-256: 0276e9ef8afe8a90b386795e3e9873d46ed988b4b925acfac9a95a8c73bc3103

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