Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5a100eab7e2726…

MALICIOUS

PDF

74.9 KB Created: 2021-04-04 20:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 75b965f1be9501ada2350ced9e38953c SHA-1: 585fde32facff262a4e56fedea13c402c3454910 SHA-256: 1b5a100eab7e2726f71e316e8c1286b50e9bae4580acd766c763a4383a49133c
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 0.9999

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://golowaki.ru/award?keyword=carcinose+p%25C3%25A9riton%25C3%25A9ale+diagnostic+pdf PDF link annotation
    • https://cdn.sqhk.co/mivuxakadu/iaicqgc/turisidozazuwiruzus.pdfIn PDF document text
    • http://leomannapov.com/how_much_does_an_industrial_psychologist_earn_in_india98c1z.pdfIn PDF document text
    • http://remontlegko.info/silijupowupuloronitewuia0id.pdfIn PDF document text
    • https://cdn.sqhk.co/ramojezi/eJphijg/nut_and_bolt_supply_near_me.pdfIn PDF document text
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/7535881.pdfIn PDF document text
    • http://yarrebitteh.online/gisafenuvusudigalapaxqwt8.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/YFhfjhI/eset_parental_control_for_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/d7uphfb/geometry_dash_world_scratch.pdfIn PDF document text
    • https://duxetaxegijojem.weebly.com/uploads/1/3/4/8/134870405/zosasevisawoguvevumo.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/c5gijaD/word_collect_apples.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/xonobijikivo/loganukojuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/algebraic_equation_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/57548089253.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/74255740375.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/notapu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/the_bedford_reader_13th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/graph_theory_exam_questions_and_answers.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 6

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_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 5368 bytes
SHA-256: bc1c5117af498697ae45c62f63b4c37b464967622ab8d1b78a590c3f29e6e21d
font_01_sfnt_off0000f86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86F 10584 bytes
SHA-256: 2e9e15ad47481ec9f76594e503b866eb86314d2a510cd3d51f87193cebf76f24

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