Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79e576f3c64cb7c…

MALICIOUS

PDF

68.3 KB Created: 2021-03-01 21:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 55aa2f4fc8a6d4e61e18c671cc1e46dc SHA-1: ea4143c61f99fec48e1600b02fa23968d142f173 SHA-256: f79e576f3c64cb7c014ed190078d8cea6d0078364b861f5919d9e7404a280658
186 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 0.9997

Heuristics 6

  • 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.
  • 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://dugedepap.ru/wix?keyword=dayton+flyers+football+recruiting PDF link annotation
    • https://bovakexigi.weebly.com/uploads/1/3/5/3/135314068/bawusosexile.pdfIn PDF document text
    • https://zulevoto.weebly.com/uploads/1/3/2/6/132696122/saravun_nefowu_volajelobumuz.pdfIn PDF document text
    • https://cdn.sqhk.co/gediwuwanol/2rpiejc/38560925490.pdfIn PDF document text
    • https://pumelagu.weebly.com/uploads/1/3/2/8/132814433/guzisebikes.pdfIn PDF document text
    • https://timodidub.weebly.com/uploads/1/3/1/3/131379596/6e0cdbaaf68.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/ifowic4/bloomsbury_farm_tickets.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/Tijie4C/puvusaduxis.pdfIn PDF document text
    • http://idealslimitalia-official.site/die_bergdoktor_episodenguidewlgbd.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/Rgcvgih/xafipozajeza.pdfIn PDF document text
    • https://wazalopa.weebly.com/uploads/1/3/0/8/130814586/semewowemubo.pdfIn PDF document text
    • https://zobilajes.weebly.com/uploads/1/3/2/6/132682335/2b50f5da95463a2.pdfIn PDF document text
    • https://bazuxenulasiv.weebly.com/uploads/1/3/0/7/130740357/1374671.pdfIn PDF document text
    • http://bidumowot.22web.org/72986301130.pdfIn PDF document text
    • https://penoruzeni.weebly.com/uploads/1/3/4/1/134132400/vogileluf.pdfIn PDF document text
    • http://copyrights-notices-helps.com/disney_world_extra_magic_hours_dec_201912sze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konugatevokaxot.epizy.com/88308524527.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/burnout_revenge_pc_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/analyzed_poems.pdfIn PDF document text
    • http://dijifituviga.epizy.com/what_is_empty_elements_and_is_it_valid.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/ethical_issues_in_business_a_philosophical_approach_8th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/archero_boss_guide_chapter_3.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_off0000cc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC78 5288 bytes
SHA-256: dbf40d94d8b03c2befb8cb34bfc04db6ec0db3f4ad82909796d770b77ac282bb
font_01_sfnt_off0000de9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9C 11436 bytes
SHA-256: 6c90533a116a65b39742d7b003299c447f9e2fcb74cc5ed1847f4c9495a6619d

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