Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9aebce43a96572…

MALICIOUS

PDF

67.7 KB Created: 2021-03-15 02:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b04086b23ba2f85e6a07962237c2fb11 SHA-1: c63c105b0b9bd59befc24839aa86e1c73fb7e619 SHA-256: ff9aebce43a96572fb9659c31d585cddd0365dc305a69440d2155314d2c67590
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://ponafet.ru/wix?keyword=imperfect+competition+problem+set+%25234+answers PDF link annotation
    • http://pozufopajosel.mypressonline.com/55162170377.pdfIn PDF document text
    • https://widonudafedezu.weebly.com/uploads/1/3/0/7/130776490/66eef7c8b03.pdfIn PDF document text
    • http://luxuwum.mypressonline.com/86213147190.pdfIn PDF document text
    • http://new-volosi.ru/32829775299y8f5l.pdfIn PDF document text
    • http://sewonmedix.ru/23940070168gart1.pdfIn PDF document text
    • https://kofulunaj.weebly.com/uploads/1/3/5/3/135320514/denejifowavut.pdfIn PDF document text
    • http://dektesheff.xyz/algo_esta_cayendo_aqui_lyricsbem3k.pdfIn PDF document text
    • http://anyita.space/133628138759cd3n.pdfIn PDF document text
    • http://stixlife.info/john_deere_tractor_mower_sale86txy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sefowolo.atwebpages.com/45381855694.pdfIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_856e0f2c49014399acaa27eb426c2517.pdf?index=trueIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_99ad53470fae44ceb8fef34530d13c6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9631d274-eaf8-4b7a-a9d9-e78a224a6cf3/76823130354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62f797b-9a28-4192-8fd0-e04846761ec0/what_does_ideological_state_apparatus_mean_in_sociology.pdfIn PDF document text
    • http://niwuganol.epizy.com/84025782281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b03f4f-0836-4da8-99d5-3e3dbb48e58c/scid_5_free_download.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_00f832980cef48c1aa0248542eb4680b.pdf?index=trueIn PDF document text
    • https://104e3d6a-8609-4a5f-ba89-88df40aeb326.filesusr.com/ugd/3cb22f_4f2ea07fac1f41e5bbac79a3756c8c37.pdf?index=trueIn PDF document text
    • http://didefoxesepu.rf.gd/fnaf_silver_eyes_graphic_novel_characters.pdfIn PDF document text
    • http://bikumekomem.epizy.com/52815658281.pdfIn PDF document text
    • http://kizaseridofe.rf.gd/84574091994.pdfIn PDF document text
    • http://zuzeburim.epizy.com/accretionary_prism_formation.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_off0000cc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC33 5028 bytes
SHA-256: 766e6219e52c1dbc1ba0d5ab3fd75dc5f556fe1603dc76d3169a3d1797c439c3
font_01_sfnt_off0000dd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD39 10628 bytes
SHA-256: af85de8ab989e85fcfdcba67eb3f725dbd955494da01241feaa0db235f41b2e4

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