Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0692f8ff3eca678…

MALICIOUS

PDF

126.7 KB Created: 2021-03-16 04:30:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48c7a72e18fb4244ae14aa71f25d16e6 SHA-1: 6a8158dfb3781ca3779b534b7b65faf1571dd4a1 SHA-256: e0692f8ff3eca6785cef6a5b2ed48d5c148a8783d1a0aa446261c4130342a244
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 by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs point to potentially malicious or phishing sites, and the document body, though heavily obfuscated, contains metadata related to the file's creation, which is consistent with malicious document generation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/123?utm_term=evidence+of+evolution+worksheet+answer+key+pdf
    • https://cdn-cms.f-static.net/uploads/4448347/normal_60254830d8e3a.pdf
    • https://static.s123-cdn-static.com/uploads/4413835/normal_5fe206e1cd0ca.pdf
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/14f2de566bd.pdf
    • https://tunefanixeso.weebly.com/uploads/1/3/4/7/134733210/5760342.pdf
    • https://vesizolakaz.weebly.com/uploads/1/3/4/3/134333528/1190727.pdf
    • https://zabavorurexezab.weebly.com/uploads/1/3/5/3/135314693/8295953.pdf
    • https://bufujibuku.weebly.com/uploads/1/3/4/8/134862056/sokuwe.pdf
    • https://cdn-cms.f-static.net/uploads/4476601/normal_601a195ef2354.pdf
    • https://vegekevovixo.weebly.com/uploads/1/3/1/4/131437475/ladiwomamabutisid.pdf
    • https://xokizaneg.weebly.com/uploads/1/3/4/8/134886830/wetarewilufa-jeduzo-lalenezumuve-ruziziwomepesad.pdf
    • https://fanamixaxa.weebly.com/uploads/1/3/4/0/134017579/suvajopaputodo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_2d6fdf329f0c4a61b02be917f7ec999a.pdf?index=true
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_9875a6a7cd1d4bfbafcfdaab20c45852.pdf?index=true
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_45401ff031c140518139458400025495.pdf?index=true
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_2e99bb4277a04742975949273f3b5ddd.pdf?index=true
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_36f40dcf1d4d4394ba12ce575ca99e85.pdf?index=true
    • http://japinoxizidunub.myartsonline.com/mabujusimewimazizasi.pdf
    • https://7b806e58-2e0f-4c22-b5e1-e0f71c4d6e86.filesusr.com/ugd/8da65f_99a87575d5994cb9918626046de9a1f4.pdf?index=true
    • http://megigezorozo.atwebpages.com/kebaxedawakofinowepedaras.pdf
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_05aa51b8b2c040e7860cbb23ab93516e.pdf?index=true
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_d92291fd08414efba09c1ca46f5549b7.pdf?index=true
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_baa71647734545f09a622c55b3ce5cdf.pdf?index=true
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_4fe51e8a04ce452e8263a99c52807df0.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b5e9.bin
e2ac147fdadb6503ff8d5c8ae2281907f1ed35eee2693d5e8673383a1d2ce489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5E9 5516 bytes
font_01_sfnt_off0001c8d0.bin
63820bbaece8126d6828be86d0028eeead78f12f2d1c932b29006798c6d46445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8D0 10484 bytes

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