Malicious PDF — malware analysis report

Static analysis result for SHA-256 8575b329428ad8df…

MALICIOUS

PDF

101.4 KB Created: 2021-03-18 21:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d29a290b2fb3d80f97bd593fd904cdf SHA-1: d1c2a1dbcc9254382f1d820b3f1bcea01562bfb4 SHA-256: 8575b329428ad8df560c4a5dde5d2d985eb053170c8d809390cc3d8c8e87c079
156 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including ML classification and ClamAV detection, indicating it is a phishing or malware distribution PDF. It contains numerous external links, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://ponafet.ru/award?keyword=agamas+pdf+english
    • https://cdn.sqhk.co/bikugipozamu/14gg0eo/slow_motion_video_creator_online.pdf
    • https://cdn.sqhk.co/dawadetugas/bge1jbe/69783097024.pdf
    • https://cdn.sqhk.co/wibononuve/JidCSl2/pathogenic_organisms_list.pdf
    • https://nalepigetor.weebly.com/uploads/1/3/0/9/130968958/lupopu.pdf
    • https://jonenatone.weebly.com/uploads/1/3/1/8/131872225/wanonexexedep.pdf
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/8719462.pdf
    • https://cdn.sqhk.co/famazipow/xiiU2SQ/14444521113.pdf
    • https://cdn.sqhk.co/rasetiwulipu/gfjjtij/knife_block_set_with_sharpener.pdf
    • http://momentikshop.space/janolanixivirutjtqi2.pdf
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/fijij.pdf
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/99ca2d3df1bf0.pdf
    • http://betmoy57.com/do_any_taco_bells_serve_alcoholt21g1.pdf
    • http://feelslike35.com/kidde_kn-coeg-3_false_gas_alarml4nnm.pdf
    • https://vinovubetiloj.weebly.com/uploads/1/3/4/6/134679092/7164790.pdf
    • https://dedemapisiwopiv.weebly.com/uploads/1/3/0/7/130775251/8303518.pdf
    • https://zolezuborejizo.weebly.com/uploads/1/3/4/4/134444688/5661288.pdf
    • http://lnstagramcentre.net/40566950727hh14u.pdf
    • https://cdn.sqhk.co/naxupowu/aNuqVbH/lenewitudoxelasote.pdf
    • https://cdn.sqhk.co/jadepibake/Whje2ja/robert_frost_poems_fire_and_ice.pdf
    • https://lutowixo.weebly.com/uploads/1/3/4/7/134705225/78729.pdf
    • https://jewevugaxezi.weebly.com/uploads/1/3/5/9/135967143/926175.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_8976c9d24e8549c981d73765db985684.pdf?index=true
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_f36e734c0f5a45a9bdbc6520138a6bc8.pdf?index=true
    • https://c538924d-9290-4e35-808b-5013ecaac822.filesusr.com/ugd/047ea9_33431680d6164861bf20f4b835246742.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001432a.bin
dceacc136b8f243407f79b0aed5b8f350d4d0dbb2e3988851705a2dee5c9e869
pdf-font-stream PDF embedded font (sfnt) at offset 0x1432A 5348 bytes
font_01_sfnt_off0001553d.bin
f7115ef747a3d32ae104dde5b47151f08846ea44547bc5edfb85954ace8ee075
pdf-font-stream PDF embedded font (sfnt) at offset 0x1553D 13288 bytes
font_02_sfnt_off00017d37.bin
73d36a6114c93afba98278b1a8f66181e8486f90df77308d8cf7e14c16a645c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x17D37 2688 bytes