Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc3e462a599e7c7…

MALICIOUS

PDF

83.6 KB Created: 2021-02-18 05:25:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7f9633efd30e7aa8198c367226472d3b SHA-1: 3b99e882b1e06eac432392d27707d533c9c860cc SHA-256: 3fc3e462a599e7c7f54acbef079ffabbe32bfecd63a29a2eac600a5ac4fee025
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the document's structure strongly suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=current+navy+diving+suit PDF link annotation
    • https://cdn.sqhk.co/remigalakefo/aienggc/the_last_door_walkthrough_chapter_3.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/thigjdp/gotudufozamanevawodeje.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/SeiduNE/werabimunotozawudor.pdfIn PDF document text
    • https://gasimela.weebly.com/uploads/1/3/1/3/131398285/vaweterasiguze-mepinefem.pdfIn PDF document text
    • https://radewisuvux.weebly.com/uploads/1/3/4/6/134689192/6af5c.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/vhf1giK/kuzovume.pdfIn PDF document text
    • https://cdn.sqhk.co/jigotove/giEhbjb/31272177344.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/hcZTohc/48966367704.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/UchbcXG/bhop_pro_hile_apk_indir.pdfIn PDF document text
    • https://cdn.sqhk.co/jujegopenop/hh36jim/potevorud.pdfIn PDF document text
    • https://gupijevud.weebly.com/uploads/1/3/1/4/131407369/35405765.pdfIn PDF document text
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/5166bc4633.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/sjaeLCM/rogulonapelewumokakoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koburolamugalo.rf.gd/39323260157.pdfIn PDF document text
    • http://rorolavosi.rf.gd/10th_compartment_date_sheet_2019_pseb.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/ce_certified_full_form.pdfIn PDF document text
    • http://voderekop.rf.gd/how_do_i_apply_for_food_stamps_in_el_paso_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/react_native_animated_android_slow.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/lajabibi.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/crossword_jam_answers_greece.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_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 5028 bytes
SHA-256: 91bf383ba61225c6aa692db228489361b8193869c0c40874b4c29d36ed77cef7
font_01_sfnt_off000119af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AF 12288 bytes
SHA-256: 9a692b4f03424c313295e0828758e78ac615f0d54a4174ab91f34d0d672926f2

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