Malicious PDF — malware analysis report

Static analysis result for SHA-256 908a51c094bd599c…

MALICIOUS

PDF

70.3 KB Created: 2021-02-15 19:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d1caa9950968dc244af5d91aa780b0e2 SHA-1: 76c93190f1e8235702740f48b5c5a4a8152313ee SHA-256: 908a51c094bd599ce637966a50d6f4a3eb03ac70ea02133291175809d4a821be
126 Risk Score

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/123?utm_term=how+to+create+cracked+minecraft+servers PDF link annotation
    • https://cdn.sqhk.co/jefapukawore/jjEhb41/learning_colors_worksheets_for_2_year_olds.pdfIn PDF document text
    • http://auto-agents.space/9513349292mr5he.pdfIn PDF document text
    • http://atlas-copco.su/al_kitaab_part_2_2nd_edition_answer_keyq7ql3.pdfIn PDF document text
    • https://riluvozig.weebly.com/uploads/1/3/4/3/134380056/vegow-lalagevutewit-lakus-nifutoted.pdfIn PDF document text
    • http://parhelifrl.space/community_helpers_worksheet_kindergartenzmhnm.pdfIn PDF document text
    • http://card2card.live/certificato_di_residenza_autocertificazionecadvw.pdfIn PDF document text
    • https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/7575088.pdfIn PDF document text
    • http://present-mag.ru/fimawenoxirrdbg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tezipibuboxigo.epizy.com/xulefo.pdfIn PDF document text
    • http://jikeroti.epizy.com/hitachi_capital_corporation_annual_report_2018.pdfIn PDF document text
    • http://wedutatitupaze.epizy.com/cisco_networking_academy_answers.pdfIn PDF document text
    • http://wipidomi.rf.gd/pete_s_dragon_full_movie_in_tamilyogi.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_off0000d666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD666 5312 bytes
SHA-256: 33a2d1489dbc71916a9d8adb1321d3ce47ca4f06b13ca33630615377179cea69
font_01_sfnt_off0000e87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87E 10564 bytes
SHA-256: 488968aa45659bc203db8dc433be5ead0802826ba2af0010c52c220d051bb4ca

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