Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e12a39b93ed1a4…

MALICIOUS

PDF

76.6 KB Created: 2021-04-25 21:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9ca9be3250f36444ed5ffd4a95d1ba3d SHA-1: 539cebfe2bd47c3cd2a958f93f18359b04c73edf SHA-256: 11e12a39b93ed1a441e690d1c2ed61c6a5188ca2bf6353a9e7a58726d849ed67
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=the+good+the+bad+and+the+ugly+sheet+music+piano PDF link annotation
    • https://vimumigejanamim.weebly.com/uploads/1/3/4/6/134619591/beliwaviwelo_vukitepa.pdfIn PDF document text
    • https://nezasofesaz.weebly.com/uploads/1/3/5/9/135961661/mekakep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390663/normal_6004b8fb8aeeb.pdfIn PDF document text
    • https://dazutexigamufo.weebly.com/uploads/1/3/2/7/132740900/bae8d1e8773.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/tgcykgi/ghost_followers_iphone_app.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/hfzfeie/99981176811.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/5430801.pdfIn PDF document text
    • https://gesaseli.weebly.com/uploads/1/3/1/3/131379828/xiguvemipo_zogofuluvas_roxoxitamuvesat_ligebavu.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/13788037574.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/5Hhe5hh/tabletop_christmas_tree_hobby_lobby.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477635/normal_60507d3bb69e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5fd646dc4c35c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_66a0628ec46e4e09ad62bc89b427f98a.pdf?index=trueIn PDF document text
    • http://wenares.myartsonline.com/zibuveguferawudosum.pdfIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_6bc6702f01d84e3e858510a418c720cd.pdf?index=trueIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_d7bc14219c744f1ab5724b04826b0a7e.pdf?index=trueIn PDF document text
    • http://visunes.myartsonline.com/54925667638.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/70565193812.pdfIn PDF document text
    • http://sulenovigadi.myartsonline.com/xarotaniponisexegawew.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_e8ca0b812687412fb20e394436831cc2.pdf?index=trueIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_dc4647c6e23340a5aa6056f5ca36d80a.pdf?index=trueIn PDF document text
    • http://moxuzaridob.onlinewebshop.net/college_panda_sat_writing_download.pdfIn 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_off0000ebbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 5580 bytes
SHA-256: f7e3f6163ce134cd5882f1a6b35f2ae6b38249ccdf5ae1e560ce32e36fca4424
font_01_sfnt_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 11160 bytes
SHA-256: cebfe87841f13bbbe1c2fbe32035b02521e1ef3ade2a8ac6d2cf060f1bf1d19d