Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bb7bf23073038f…

MALICIOUS

PDF

86.9 KB Created: 2021-03-20 08:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d075e97c3adb96716b27120ea8e1c78a SHA-1: 98dda23f385588fe6d503f0ff7822ef413c3a161 SHA-256: 05bb7bf23073038fca09e3d0afedc6130c61cb77ad3986b17037b7a1e6c6d1ae
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=free+tv+project+calendar PDF link annotation
    • https://jasasenud.weebly.com/uploads/1/3/4/1/134131975/vozaloborub_wisow_fokagar_limavowarisek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459785/normal_600eb2d25befe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479223/normal_600e13726bb03.pdfIn PDF document text
    • http://supernefritroller.xyz/reading_comprehension_worksheets_for_10th_grade2m3qu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464327/normal_604344f938e8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_60504f22a36cb.pdfIn PDF document text
    • http://indonesia2health.online/sudukula9ybe3.pdfIn PDF document text
    • https://gorasamigizutod.weebly.com/uploads/1/3/4/6/134600185/6c5fab2734.pdfIn PDF document text
    • https://tizizuner.weebly.com/uploads/1/3/1/8/131872037/6661099.pdfIn PDF document text
    • http://setakini.22web.org/8775370298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_60375d12ea522.pdfIn PDF document text
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/sidasufur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470222/normal_5ff6c09ef3a66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448724/normal_60317e72383b3.pdfIn PDF document text
    • http://naturebiolog.space/surah_yaseen_ka_wird_e_mubeen8tt2t.pdfIn PDF document text
    • https://rokozozo.weebly.com/uploads/1/3/4/4/134498035/zovubulame_sapez_buzanojejijoki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kirogebi.epizy.com/30489627023.pdfIn PDF document text
    • http://koponobazad.rf.gd/bose_wave_music_system_iii_cd_radio_and_bose_wave_multi-cd_changer.pdfIn PDF document text
    • http://vuripoda.epizy.com/basejoxegade.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10839 4720 bytes
SHA-256: 450183a0c8d688758851db603353fdda32866da52ef52f955eebe50e2902651d
font_01_sfnt_off00011859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11859 12020 bytes
SHA-256: 2ad25faa72094f2bde1af0a9296e4b8ae4d5fb0109cf3a2876f07058609f31de
font_02_sfnt_off0001414c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1414C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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