Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77ec58c2f7fc384…

MALICIOUS

PDF

81.4 KB Created: 2021-03-03 10:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 92a9385daba92c34bd894be6c1921384 SHA-1: a9a7779c4ee86723440934f996ae3d9e33282bce SHA-256: d77ec58c2f7fc384d44c9131fe302a7ecf84d383c89c0db2f3a1d2857901cc23
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 0.9997

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 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://leonvi.ru/123?utm_term=ps+i+still+love+you+part+2+soundtrack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4504788/normal_603455b5e5b38.pdfIn PDF document text
    • https://tadesurirow.weebly.com/uploads/1/3/2/7/132711952/d57f08549491c4f.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/8d9622dd03ba3.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/i3kgdii/febevinemogapusinetajedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466398/normal_60354d038dcd4.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/agecdge/tucson_gem_and_mineral_show_2020_map.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/fthjUFV/55864766529.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387715/normal_5fc6adab7fb15.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/jfDEhd8/roman_numerals_converter_date.pdfIn PDF document text
    • https://daxulidotuviwo.weebly.com/uploads/1/3/4/5/134597057/5250264.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/dibIhgn/pongal_2021_tamil_nadu.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/cVh7gch/peliwujajidalofuwu.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/ritoma/balanirutafomegajuzeze.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/synergy_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/28488465521.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/inductive_reasoning_geometry_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/team_knight_rider_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/sedona_self_guided_driving_tour.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/15132500214.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/fifty_shades_of_grey_trailer_2015.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_off0000f3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 5308 bytes
SHA-256: 35c54018823df21ce6bf73cae1ad9cb625bdb5256baf6798290c9c6b8d046279
font_01_sfnt_off000105e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E4 10584 bytes
SHA-256: e32dc7a981727902f0cdea2520632d985ecd04ef9eded0f4e59e4544b216716d
font_02_sfnt_off00012a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A16 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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