Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d93d5186add8fa…

MALICIOUS

PDF

82.0 KB Created: 2021-04-05 10:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: dbb8f09bcc2687ca4194cb610b3bfc6e SHA-1: 9c9a4325c0d3ea2b549b7b0d203687970c79a284 SHA-256: c3d93d5186add8fa7f380ff7066876a2eb20765488b687e318c6c73794f265b1
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to attract traffic. The primary URL, 'https://xezojetit.ru/wix?keyword=cleanmymac+3+crack+serial+keys', indicates a lure related to software cracking. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

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://xezojetit.ru/wix?keyword=cleanmymac+3+crack+serial+keys PDF link annotation
    • http://sifinefopor.iblogger.org/godenofifixinakejudoverex.pdfIn PDF document text
    • http://duwosolutanuz.mypressonline.com/how_to_reset_epson_xp-820_printer.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/fusionner_gratuit_windows_7.pdfIn PDF document text
    • http://xonigej.mypressonline.com/why_is_my_furnace_not_heating_up.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/34804454978.pdfIn PDF document text
    • http://pixujuxe.mypressonline.com/endometrial_carcinoma_treatment.pdfIn PDF document text
    • http://marojuburegorad.22web.org/god_in_the_dock_movie_summary.pdfIn PDF document text
    • http://vetebozo.mypressonline.com/m_audio_keystation_pro_88_driver_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f5f74d4f-f804-4d9b-9bfa-9964b2756261.filesusr.com/ugd/e389b3_b2e4fb2b0ad74eadb6b5944ad247ca57.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_d93f6b3dbd6145f8bee1f0e08f03d284.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_279494698ba6423b9c8070b2124eaa27.pdf?index=trueIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_1f8d05c3559e422bb9c048cb3d1349fa.pdf?index=trueIn PDF document text
    • http://wevujonixusenex.rf.gd/kaxifonezi.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_37b6409eca8d453db851ff3b05381bbd.pdf?index=trueIn PDF document text
    • https://0dc5fd1c-b354-4e5b-9ccd-45395e8994ed.filesusr.com/ugd/f79e8d_fbc78262b8e4484cb8e0197761238159.pdf?index=trueIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_5370ca1f723243d5be5f203e53d45abd.pdf?index=trueIn PDF document text
    • http://xurosuforudev.atwebpages.com/29885298871.pdfIn PDF document text
    • http://takamuwemevofe.epizy.com/64050783138.pdfIn PDF document text
    • http://dozopedatofol.atwebpages.com/airy_stress_function_nptel.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/30549152633.pdfIn PDF document text
    • https://e3ba7771-1cf2-49b9-be81-d91832e8ed63.filesusr.com/ugd/bc9675_705e98973a634c25bb9df8075d0d3561.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_off0001029f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 5180 bytes
SHA-256: d8be20e8a30d3e586ab789c8671147f03a23f06bd5bb3645dfded4db71ea79c9
font_01_sfnt_off0001142c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142C 11296 bytes
SHA-256: 10e01da86b789e566135f846dff46bf3116912021651f868a52c132845156cc9