Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f74e82c304a19a…

MALICIOUS

PDF

87.1 KB Created: 2021-03-28 08:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 619af8fb885947f8f3327c3567863133 SHA-1: 13d8937d58d4b5338c25bce5d77c7da4e0202935 SHA-256: f6f74e82c304a19aee65a1a74b631c308c4d67d526c3c1718c7eef258014285b
156 Risk Score

Malware Insights

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

This PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://botokaw.ru/award?keyword=jee+b.+arch+paper+pdf', suggests a lure to a potentially malicious or deceptive website. While no scripts were extracted, the structure and numerous external links indicate a malicious intent, likely related to phishing or SEO manipulation, and is classified as a Trojan by ClamAV.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/award?keyword=jee+b.+arch+paper+pdf
    • https://cdn.sqhk.co/lilanoto/booijz2/how_to_make_a_bird_origami_easy.pdf
    • https://vinovebavelugis.weebly.com/uploads/1/3/1/3/131383284/592510.pdf
    • https://lulodepi.weebly.com/uploads/1/3/0/7/130776712/9037971.pdf
    • https://cdn.sqhk.co/dowusutitozi/jbmaogh/best_buy_augusta_maine_geek_squad.pdf
    • https://noduxexoretan.weebly.com/uploads/1/3/5/9/135993764/keloxasisadap_jubexejupom_laxevajizaxeb_danipulinizafam.pdf
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/7848420.pdf
    • https://cdn.sqhk.co/zebenane/dyCjaNG/35890934902.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e197e8f1-6cb0-4aa2-8517-37bcada0e6ba/adjust_time_on_citizen_skyhawk.pdf
    • https://uploads.strikinglycdn.com/files/ff1db39e-930a-47cd-9161-07d20a127247/63924630631.pdf
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_80834657562d478b81b39c712c499f0b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c32b3370-22e6-4896-ac71-3957c95cf0fb/cuisinart_convection_bread_maker_cbk-200c.pdf
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_ecd034324eb5405096fe8ad18438fab8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/84624ce8-f34a-4483-b62a-a906bf24eb18/webazenipozotejexu.pdf
    • https://5c54d0bb-9de8-469b-abb1-33232a952ba9.filesusr.com/ugd/370e3f_47a7f28545d14bc29f2514985f3db320.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9be4b0fe-a880-4d7f-aaf7-652fe5d63f47/rosario_de_las_lgrimas_de_mara.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117cf.bin
d177696a2a3a0beb87f02641215f45b54d10181e9827b85ce9a760222344ae67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117CF 5192 bytes
font_01_sfnt_off00012976.bin
a39f7aaa9883b674ce8e6a2913e878ea6e9ff504dec39998e62ebbbe7fceed20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12976 11400 bytes

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