Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce64f03acf58560…

MALICIOUS

PDF

76.9 KB Created: 2021-03-22 17:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6d54cbb934a284a68cfd6b80f7b9d3ec SHA-1: 98bf46aa58e4652fb810a1310daada74a2935d0a SHA-256: fce64f03acf5856046cd61e9e724363f7f21be5b59d5b5746712c15535ee3d31
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=toner+for+hp+laserjet+p4015dn PDF link annotation
    • http://buylettersonline.com/photive_bth3_philippines81mkz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378836/normal_5fdfa62e312d2.pdfIn PDF document text
    • http://dreamingdeveloper.com/910694969970ea2t.pdfIn PDF document text
    • http://slampochka.ru/lg_mini_split_problemse9lvm.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/fixibuxiropatogi.pdfIn PDF document text
    • http://nyvelsets.online/modelo_de_minuta_de_compraventa_con_poder_especial_ecuador13gfj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371020/normal_5fe28608a95e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381321/normal_5ff80f2feb3c6.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/hebrew_dictionary_bible.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/business_model_navigator_book.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/lagu_xaluna_ambyar.pdfIn PDF document text
    • http://wisecreditscore.info/anomaly_defenders_frees9p80.pdfIn PDF document text
    • http://evatopshop.xyz/xusibafetjqfen.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/wuwosepobixomerxm8sp.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/mifesiraberimovuf.pdfIn PDF document text
    • http://zatutajijiti.getenjoyment.net/69420054748.pdfIn PDF document text
    • http://shop-you.xyz/degree_of_polymerization_calculationsepll.pdfIn PDF document text
    • https://gotagifegu.weebly.com/uploads/1/3/1/6/131607164/wanomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sigakew.epizy.com/alesis_dm10_mkii_pro_user_manual.pdfIn PDF document text
    • http://luvewon.epizy.com/spider_man_venom_game.pdfIn PDF document text
    • http://wupafar.rf.gd/learn_spanish_book_free.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/kiran_computer_awareness_book.pdfIn PDF document text
    • http://karajifaderiwow.epizy.com/complejo_antigeno_y_anticuerpo.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_off0000ea2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2C 5560 bytes
SHA-256: 8680ac1639c4f45f4f2c432af2aae14f0921027b485609968f1b2f966c9e129f
font_01_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 12604 bytes
SHA-256: fa7ce14c50041f812b01f50abf087bbc431892bd38075ad97c1f86a522ee7cb2