Malicious PDF — malware analysis report

Static analysis result for SHA-256 887687ca466e3086…

MALICIOUS

PDF

74.0 KB Created: 2021-03-06 11:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f88ef635746e48dfca81c19918bd2d36 SHA-1: c857d5f61d3444e42a8104e7e770398ecbcd70eb SHA-256: 887687ca466e3086015f83ada8b48614f91282eefbe12bef8bd8b5664dffbe26
156 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/123?utm_term=washington+post+comics+flashbacks PDF link annotation
    • http://burivuvuju.medianewsonline.com/can_you_use_a_pack_and_play_instead_of_a_bassinet.pdfIn PDF document text
    • http://smirno.life/95226032396xxlf7.pdfIn PDF document text
    • https://cdn.sqhk.co/fopavege/ktKibdJ/download_asphalt_xtreme_rally_racing_mod_apk_data.pdfIn PDF document text
    • https://gazodajatara.weebly.com/uploads/1/3/2/7/132712558/7e0da6d4ef961c4.pdfIn PDF document text
    • https://cdn.sqhk.co/woragumokewi/Nibiamv/98692071317.pdfIn PDF document text
    • https://minedikatew.weebly.com/uploads/1/3/0/7/130739540/motufenorofena.pdfIn PDF document text
    • http://vinnipoh.fun/jopimevivupejigufifizonuyvrrb.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/120671.pdfIn PDF document text
    • https://kagopibuxewiki.weebly.com/uploads/1/3/1/3/131398156/sukaxivukiwiw-dikekita.pdfIn PDF document text
    • https://tufemetu.weebly.com/uploads/1/3/4/8/134887907/3da69009983e4e.pdfIn PDF document text
    • http://osummer.space/fmcg_industry_project_report9zuzb.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/kifevizibawo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nademopor/analisis_fundamental_de_los_mercados_financieros.pdfIn PDF document text
    • http://pikaderobiw.atwebpages.com/bexokike.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/60931465508.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/52127598662.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/97968384079.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5548 bytes
SHA-256: abb8adc06140e13e01c8b8cff1a71118aef4ed42095909e7976c20b908fed874
font_01_sfnt_off0000f77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77B 10424 bytes
SHA-256: 52018ae57a390e57303cb695484d4e23c912d8ae6b1b61e0e3f60908b36409d6

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