Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a832228f383bff…

MALICIOUS

PDF

77.5 KB Created: 2021-05-30 03:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 42a306476d4ba40abeaea5fb41129c25 SHA-1: 0a7d543406f9369f737905948df623c97151513c SHA-256: d0a832228f383bffdd691153ce77ce8d55f987f0d220b998ae514278935470fa
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, including ClamAV's 'Pdf.Phishing.Trojan' detection. It functions as a link farm, containing numerous external links to other PDF files, some hosted on disposable domains, and one specifically mentioning a game hack download. The presence of a download button lure further supports a phishing or malware distribution attempt. Although no scripts were directly extracted, the overall structure and linked content suggest an intent to redirect users to malicious sites or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=bloons+td+battles+money+hack+apk+download PDF link annotation
    • https://zunovuxosuseso.weebly.com/uploads/1/3/4/4/134497136/7472764.pdfIn PDF document text
    • https://tagekoworiz.weebly.com/uploads/1/3/4/0/134016686/6169231.pdfIn PDF document text
    • https://todegebonuvakef.weebly.com/uploads/1/3/1/6/131606144/fokoverajoridudugizo.pdfIn PDF document text
    • https://bufodenoziro.weebly.com/uploads/1/3/4/5/134585066/2815020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5fd8b01d99432.pdfIn PDF document text
    • https://kajemawukik.weebly.com/uploads/1/3/4/5/134589491/fisanog_bujapu_gezezikowutum_fifevuv.pdfIn PDF document text
    • https://malabukepi.weebly.com/uploads/1/3/0/9/130969546/powupi_zenodogifese.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413575/normal_6007d74fc85b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_6031dd6fb8ef9.pdfIn PDF document text
    • https://pafuzoxim.weebly.com/uploads/1/3/4/5/134585506/7890906c18c86.pdfIn PDF document text
    • https://mobasulu.weebly.com/uploads/1/3/0/7/130776822/9081926.pdfIn PDF document text
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/6545188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_605b90f9dd2db.pdfIn PDF document text
    • https://rogefiraf.weebly.com/uploads/1/3/4/5/134581109/7d11c46.pdfIn PDF document text
    • https://pesuzipowezav.weebly.com/uploads/1/3/1/6/131636843/96418.pdfIn PDF document text
    • https://duvutonog.weebly.com/uploads/1/3/6/0/136020002/8b57aced0.pdfIn PDF document text
    • https://dodesagetulisuv.weebly.com/uploads/1/3/4/9/134902864/kuwefojoxugelawedu.pdfIn PDF document text
    • https://jipoditilab.weebly.com/uploads/1/3/1/4/131407274/3884741.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/2316381.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e038670-b956-4ed2-a4b8-ccfa9572739c/loxubimadadekaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159f22e5-6d98-482f-a012-8a00dfd3ca0b/xevozogadipeno.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_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 5664 bytes
SHA-256: 7466a610aa470b37c6daa888a18ca55c74964cd6d2d8be719fa1d9bca5af676d
font_01_sfnt_off000102da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DA 10968 bytes
SHA-256: 76b26c5032ca75f9478f2ac43b51723f6748911655cd81309c685e3dca25003e