Malicious PDF — malware analysis report

Static analysis result for SHA-256 e219a2d629d02b6d…

MALICIOUS

PDF

68.3 KB Created: 2021-03-31 20:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fc40c55c9f08f72f0ef3da85f9f67ea4 SHA-1: 229e7ec2a3a02f1e3fa5a0fb70becd6044c10f6a SHA-256: e219a2d629d02b6d96894bbafbdd50ad6bfa459833be370327fcc171f38857b2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users. The document contains numerous external links, many hosted on disposable domains, suggesting an attempt to distribute phishing content or malware. The presence of embedded URLs and the overall structure strongly indicate a malicious intent to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/award?keyword=b.+p.+ed+books+download+pdf PDF link annotation
    • https://cdn.sqhk.co/fekigimuzib/6P8fjao/jurassic_craft_ep_19.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/hX5hjif/nikipodofalunufe.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/jfhcjgc/toca_life_after_school_full_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_605d8c7f1aa7f.pdfIn PDF document text
    • https://cdn.sqhk.co/melobokodijo/gejhctp/zelexufemekigomigarexef.pdfIn PDF document text
    • https://kiziwovoxapi.weebly.com/uploads/1/3/4/6/134617524/nivirorevari.pdfIn PDF document text
    • https://gudabujazoz.weebly.com/uploads/1/3/0/7/130739385/toxigijukegi-vorejuf-tewosujoxibexax-wadavej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481821/normal_60482a21e3e77.pdfIn PDF document text
    • https://jorevubo.weebly.com/uploads/1/3/4/8/134869484/7449455.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxixixixi/idgeoKZ/menufedunol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_f1815c2d3ee3424a9b33239c0accb669.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32612aa0-7e4e-4ddb-b834-ef3b50373d75/meduxuxokavifiwebujup.pdfIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_c9ee6d1634b24e11aaddedef066c6e8d.pdf?index=trueIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_df293463e6f84f45ac5eb4b551187a87.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b12850e-a383-4c9a-bb26-7ae3d0caf840/nuselimip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841d9967-f791-4e57-beb0-4eaa85687e0f/how_much_does_a_jeep_grand_cherokee_srt_cost.pdfIn PDF document text
    • https://755d026c-fd58-4633-9ca9-8af24261f473.filesusr.com/ugd/4622eb_100ee1d16ca34ca7bd274b92c29723f5.pdf?index=trueIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_f9ed5e025d08468b87f1583b32ec4856.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf0e2baa-34ab-4a7e-a140-53e2192d98b6/army_pistol_qual_scorecard.pdfIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_143a231f93864e31962cc7e8921b6ced.pdf?index=trueIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_16f30ef91f5a4f00964ccbe957709e48.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_6f1f87fe68fb46af9ab1e85c350797e8.pdf?index=trueIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_0aec7d747dae4e91984e40a568c02131.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/141094a0-a6d8-49e4-9b7e-00a129a1747f/schumacher_battery_maintainer.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_off0000cdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF5 5316 bytes
SHA-256: 672bba0d85d2be664bbe4dab04da94904329a647d4f02312343c91fd30c7366e
font_01_sfnt_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 10416 bytes
SHA-256: 36307d3c16a970195d13e5e3f8a4276822f7f7928c0db4f264e6a631d25cc9d4