Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ae2d05dd608306…

MALICIOUS

PDF

86.4 KB Created: 2021-04-30 22:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2aef81a80436098539e98f57c492638d SHA-1: 4837ffc9c73464522fea38c886f902342d15fa23 SHA-256: 96ae2d05dd6083060a955349c9abab2f106a55473bae2da02d15d101e2cf4e4c
186 Risk Score

Malware Insights

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

This PDF document acts as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The primary URL suggests a lure related to a book title, likely to entice clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://zajinet.ru/strik?utm_term=all+my+friends+are+dead+book+online PDF link annotation
    • https://lideteli.weebly.com/uploads/1/3/0/7/130775407/819229b910.pdfIn PDF document text
    • https://nagafibujur.weebly.com/uploads/1/3/4/5/134514283/zuposoxim.pdfIn PDF document text
    • http://luzupogakij.sportsontheweb.net/billyoh_tower_playhouse_assembly_instructions.pdfIn PDF document text
    • http://noxavikadovul.mypressonline.com/toyota_avensis_verso_user_manual.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/xatew-jejuvixuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380528/normal_60564cb9762b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459163/normal_5ff7a9992c081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501501/normal_6013c9bee340e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_5fd7c2400d7bc.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/doduzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482617/normal_606e9754b7eb1.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/used_kenmore_elite_front_load_washer_and_dryer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fd1a8bbad99d.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/framed_ink_descargar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480891/normal_603599727584c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nizofikunatafu.atwebpages.com/probability_density_function_cdf.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/fubefolinofijuxalajin.pdfIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_86542fdddbbe45d09be842c74d1c3f8a.pdf?index=trueIn PDF document text
    • http://vonikolodu.rf.gd/kaabil_movie_free.pdfIn PDF document text
    • http://mevalegija.rf.gd/16666523347.pdfIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_4fa2321e6cd24a39ac52db3834c6a7b6.pdf?index=trueIn 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_off00011391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11391 5348 bytes
SHA-256: f6222bb199dfe3d215f42f419b92118f0b894bd13fc69722f42015b96771ba1c
font_01_sfnt_off000125b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B9 10656 bytes
SHA-256: ac4e54b3773a5037553a4f7919b98d3a27469a41e2757d13fb0d520dc3711896

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