Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d694d000ad51a31…

MALICIOUS

PDF

83.5 KB Created: 2021-03-16 06:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bc352173c27b0e82b53050a017d8e76 SHA-1: 33c9bd31ca38956d224d339e95be0d0e4f89e345 SHA-256: 0d694d000ad51a315eccfe29cb47e817e58ddd81606eb9599d59104f1b50587b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to direct users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or content-distribution attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/aws?utm_term=how+to+clean+grill+cast+iron+grates
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/xerapetaxuxudew.pdf
    • http://pedalini.club/motorola_t5720_walkie_talkie_specification75123.pdf
    • https://tanorejenajid.weebly.com/uploads/1/3/1/0/131071151/fopoxitukoki.pdf
    • https://static.s123-cdn-static.com/uploads/4471091/normal_5fcf4193d9d48.pdf
    • https://cdn-cms.f-static.net/uploads/4380080/normal_603be12d7d03a.pdf
    • http://lnstagramsupportinfo.com/881696845235lfcx.pdf
    • https://dexulivixuwe.weebly.com/uploads/1/3/0/7/130739852/7019827.pdf
    • https://lujovimujesami.weebly.com/uploads/1/3/4/0/134019161/3652111.pdf
    • https://jajozopikikaju.weebly.com/uploads/1/3/4/3/134359408/fixare.pdf
    • https://sojanonef.weebly.com/uploads/1/3/0/9/130969598/11cce5.pdf
    • https://gakosokilexavum.weebly.com/uploads/1/3/2/6/132695298/3738114.pdf
    • http://dompodklyuch.com/3270625275t2ao.pdf
    • http://korsabarca.com/equipment_maintenance_log_templateri47u.pdf
    • https://soregekewo.weebly.com/uploads/1/3/4/2/134266411/b8eb73.pdf
    • https://mabavelege.weebly.com/uploads/1/3/0/7/130775551/6732258.pdf
    • https://noparageselex.weebly.com/uploads/1/3/1/8/131856757/suwubeg-xokusolomazebed-muxubadojad-defatikeda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dixaleko/applique_letters_free.pdf
    • https://uploads.strikinglycdn.com/files/6db23ec3-1663-4acf-8a4f-8818021bd631/78666337003.pdf
    • https://uploads.strikinglycdn.com/files/94c07b19-a9a8-4940-b9bd-a3ea5f98d242/kabodo.pdf
    • https://uploads.strikinglycdn.com/files/7cbdcd8d-aa6c-46c7-af30-fc8893d23d39/95430928007.pdf
    • https://uploads.strikinglycdn.com/files/b6fd5bd8-5893-437a-b04d-a04f12dde9c7/15150812347.pdf
    • https://uploads.strikinglycdn.com/files/1207c21a-8cd8-4737-b25d-cc130c9dd908/sukatutevubes.pdf
    • https://s3.amazonaws.com/dowavelaxam/company_profile_powerpoint_template.pdf
    • https://s3.amazonaws.com/paropabaru/savupunudisuf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcf2.bin
2ec27aff90daa0d66e9b80eac3ef7a5f3edf7de138279c76f88c05f0d8bc4a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF2 4808 bytes
font_01_sfnt_off00010d5a.bin
754f8049c711fe83ab8c39d81e06a784fc5501b78d0ed07a04363563e703df48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5A 10732 bytes
font_02_sfnt_off000131ff.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131FF 4324 bytes

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