Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bb475bae8f0649…

MALICIOUS

PDF

75.0 KB Created: 2021-03-01 02:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0dbad7a421ddbe1c04467a7e35c3bed0 SHA-1: 2bf96d138769c488f2202abae51829a9dde0e8f3 SHA-256: 32bb475bae8f0649df58adbdefcfc768dc4070c9c8c7a62508a6cfdc930cf517
126 Risk Score

Malware Insights

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

The PDF document uses a lure related to Windows 10 system image restoration to disguise its malicious intent. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing attempt or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=how+to+restore+windows+10+system+image+file+to+a+different+computer PDF link annotation
    • http://bettyloustintruckbbq.com/98796895844dd4ud.pdfIn PDF document text
    • https://doxizuzipoleri.weebly.com/uploads/1/3/5/3/135323895/mojupuvejutad.pdfIn PDF document text
    • http://reetodo.online/bupijawoporatunopc000v.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/3627792.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/EeFhahi/car_parking_multiplayer_download_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489994/normal_6033feff1b998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451574/normal_6002d1a940069.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/ihQjbRk/dining_room_sets_for_6-_8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379029/normal_5fe11bd64f222.pdfIn PDF document text
    • http://hookup154.fun/rejifaloxanjitwl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rinotox.rf.gd/pevofuzo.pdfIn PDF document text
    • http://zipifuxe.epizy.com/konejijudofavonovixidon.pdfIn PDF document text
    • http://rokodukewab.epizy.com/glitter_in_the_air_piano_sheet.pdfIn PDF document text
    • http://bunulewokiluko.epizy.com/congenital_cerebral_arteriovenous_malformation.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_off0000e600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 5824 bytes
SHA-256: acf32969cf9e6def6489a2fe0103bd0e2e34e18159e73b643a4c41c2b8ec24a6
font_01_sfnt_off0000f9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DF 10712 bytes
SHA-256: f18433b4d1f93790397f5dbbada78e1572eead3721b60c35ec308a8cb359b42e

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