Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f754a1ffed8b945…

MALICIOUS

PDF

74.8 KB Created: 2021-03-28 16:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 58c5338dc03779e72725d036a88e0890 SHA-1: 949cd4cb63321564223630a896263ab276479aff SHA-256: 2f754a1ffed8b94575234aacf009fc75d07af7bf76c34da90f80ea901ecf0b0e
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-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://druttle.ru/wix?keyword=marma+points+for+sleep PDF link annotation
    • https://suxozunepewax.weebly.com/uploads/1/3/2/8/132814427/nutasevutagune_lijepetume_burekob.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/AXjbgex/arcane_quest_legends_offline_rpg_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/7bhfjea/50055250720.pdfIn PDF document text
    • https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/2666843.pdfIn PDF document text
    • https://mojulikobamod.weebly.com/uploads/1/3/4/4/134488450/2470794.pdfIn PDF document text
    • https://ranekiwoj.weebly.com/uploads/1/3/0/8/130814960/xesitibuzoluju-fofusipegifun-rurelovum-jegipir.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/posufij/computer_architecture_and_organization_notes.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_1a6f5bec8aaf4d88b91e7ea642ce7721.pdf?index=trueIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_46afb418b7554678b131bc92e7b28341.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/macmillan_mcgraw_hill_4th_grade_math.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/nemaduweloraketeniniperar.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/51491627310.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/renukolutuwev.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/django_template_inheritance.pdfIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_465be0900e4044a1b4407c73734015f1.pdf?index=trueIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_d91a78a6dc9347ba971a54ca3100b3fe.pdf?index=trueIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_bc2eb6c550e949a495d1b777afb1f8a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexeliku/10416644125.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_09372d4e493240a4a2f5b5d07491a52d.pdf?index=trueIn 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_off0000e836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 5052 bytes
SHA-256: f7c088f6cea862d62196ee024ec1c2a23f786c103bbd2cd0b3429ca47812b56f
font_01_sfnt_off0000f95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 10404 bytes
SHA-256: 3f0f5f3dc4463158376fe804ca1114ea247ea2f1e7459ac6d83c28f078630bd9

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