Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dff6d6bf0e74b6c…

MALICIOUS

PDF

87.2 KB Created: 2021-03-27 15:09:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2d2038b8c576ebe4bae0bb936a9228d SHA-1: a01cca7e2afc7103822683c676f27d7b9ced7280 SHA-256: 9dff6d6bf0e74b6cf6481263f4020eb5b0333d37329ad09c0d8aed16ec6bc661
164 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. It contains numerous external URIs, including suspicious domains like 'lozipotod.ru' and 'domastmsk.space', suggesting an attempt to distribute further malicious content or phishing lures. The presence of a PDF_SEO_LINK_FARM heuristic firing indicates a high volume of generated links, a common tactic for SEO poisoning or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/123?utm_term=surya+the+soldier+new+south+movie
    • http://domastmsk.space/powerpoint_themes_free_for_windows_10s5qq7.pdf
    • https://cdn.sqhk.co/vasegodesazu/chdm6nh/6213935236.pdf
    • http://genusttwsr.fun/wool_classers_reporteeiqo.pdf
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/ec3865fc.pdf
    • http://reduslimitaly-official.site/55027802162s61kb.pdf
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/9029076.pdf
    • https://cdn.sqhk.co/kululojilo/Ejnic0Z/18479637231.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_d8b23767eecf4b9c806940effd680262.pdf?index=true
    • https://801a9f91-e12c-4b3a-b535-42c3eaff61c8.filesusr.com/ugd/d237ef_1965748c1d4d47a087a6450bd15bfbce.pdf?index=true
    • https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_26e3cf21050c45c580b43caad6345f3b.pdf?index=true
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_05fc3e1df5614d4ba59d9a4f83690fde.pdf?index=true
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_9b01b86cc47946b3809215d77d691c4a.pdf?index=true
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_79cee126058b496ca01a9fa92de1cd9a.pdf?index=true
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_96b88fbfcd064feca31960472f06f479.pdf?index=true
    • https://ff999131-262c-4f46-aa1e-84c50d3d9e43.filesusr.com/ugd/a474dd_6563c16d3a8e44e0a5cd028fafebd759.pdf?index=true
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_09be6d4337344def83e94f094ff5662f.pdf?index=true
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_cee045cc01ff433591c8a0fe0396c052.pdf?index=true
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_51afa5ae65294fb6b976315d5325ccf5.pdf?index=true
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_6cc8a771d70b4a7aba52c967158e4a17.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a0.bin
f1582fea7db4053ab8104b155e7854f8b25a67cb5bfb4f40ef44d8d94d26e501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A0 5304 bytes
font_01_sfnt_off00010589.bin
8ca07b85bb680a37ca9770f62d0ca33291b93ec0e74f861f2bde313214c6a4d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10589 11192 bytes
font_02_sfnt_off00012c27.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C27 16164 bytes
font_03_sfnt_off00014140.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14140 4324 bytes

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