Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17545d8d17327d6…

MALICIOUS

PDF

68.3 KB Created: 2021-04-29 23:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 06abde17d1056f961ec7356dbd6aa6d9 SHA-1: 86ddb57edd0f3f85a29bbe35f3e30c885f564d4e SHA-256: d17545d8d17327d64ed31b66147051fcff00110894340459e1364f7ee2693d18
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-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://crophysi.ru/strik?utm_term=duromax+xp10000e+generator+owner%2527s+manual PDF link annotation
    • http://zokumujanuni.iblogger.org/cctv_camera_specifications.pdfIn PDF document text
    • https://sawatulaboror.weebly.com/uploads/1/3/2/7/132710797/7155433.pdfIn PDF document text
    • https://jerezuwiwufuken.weebly.com/uploads/1/3/4/3/134355676/riwoponisap.pdfIn PDF document text
    • https://jojiwunu.weebly.com/uploads/1/3/5/3/135387754/liwikomupowude_dajakagis_xusabapuxo_nurek.pdfIn PDF document text
    • https://tuxaxigete.weebly.com/uploads/1/3/5/3/135324810/rovezu.pdfIn PDF document text
    • http://riluvujabadi.iblogger.org/basics_of_aerothermodynamics_hirschel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxamemi.epizy.com/ledovipitajaki.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_44bfad25007d4f1588ca44de14d91cfe.pdf?index=trueIn PDF document text
    • http://faduzidivatakid.epizy.com/lononalawawula.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/yuki_no_hana_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/linked_list_using_template_c_program.pdfIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_d1cb7e50ead244fd8b93ca38dc5a9d70.pdf?index=trueIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_892ca26370864a688954733b6f55fd9b.pdf?index=trueIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_04c6977cce264cb7970cf9aa0a1e8849.pdf?index=trueIn PDF document text
    • http://xetibewiz.rf.gd/48509320066.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_6a7693d7c9004f69b225b82f422e01ba.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_19b4a16e147c44d29c8addf85afffe83.pdf?index=trueIn PDF document text
    • http://taxowojo.epizy.com/semozidovinufemek.pdfIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_d3e53e6a9a124811afd31f6c08fdc30e.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_d633a6018a8a4ffd9bf6c3bb771e0f73.pdf?index=trueIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_632ab5ce46734bc0b17c504dc0db7ce1.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_off0000cd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0E 5528 bytes
SHA-256: b55e058d7591ff352c8be24c05cacf315290e4b79489d1592608fd273a4b3446
font_01_sfnt_off0000dfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFED 10512 bytes
SHA-256: 4b571caf7892fa48046a9a4ed3c0e4fac86781e89caccfc05e8b4bc5a830eeea

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