Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b456724dffcd0d…

MALICIOUS

PDF

73.0 KB Created: 2021-02-04 13:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 13d0d66935fee5cc13b5bc83a261b17e SHA-1: 35ab2119d57c45cc94479163d979e1e229501a5d SHA-256: d6b456724dffcd0d5bce44775984669ffdabe8f1caaa87f7d2124f4affc713c6
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=android+one+nokia+8+sirocco In PDF document text
    • https://cdn.sqhk.co/zotiperugi/AjiYidX/nintendo_switch_jailbreak_gamecube.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/BPgf37C/xuzerelaxotukup.pdfIn PDF document text
    • https://cdn.sqhk.co/sevalaturi/eQucjaG/vuxodun.pdfIn PDF document text
    • https://nodopemewave.weebly.com/uploads/1/3/2/6/132682748/zeduteri-kukajijeva-dolinebezatobo-kapokowusojixag.pdfIn PDF document text
    • https://fomememuvur.weebly.com/uploads/1/3/4/0/134000402/fodeguk.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/7987091.pdfIn PDF document text
    • https://cdn.sqhk.co/jagakutojut/Vibgehc/jake_fun_run_2019_philippines.pdfIn PDF document text
    • http://bigonetudukori.iblogger.org/27120460860.pdfIn PDF document text
    • https://bejasesazopo.weebly.com/uploads/1/3/4/5/134512805/9522228.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/wjanzp7/2234272626.pdfIn PDF document text
    • https://ruxabetuju.weebly.com/uploads/1/3/2/7/132740595/2688522.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvumudupese.epizy.com/baillie_gifford_diversified_growth_fund_annual_report.pdfIn PDF document text
    • http://kamegil.epizy.com/top_ten_album_sites.pdfIn PDF document text
    • http://jigategire.epizy.com/chote_raja_song_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/identity_theft_report.pdfIn PDF document text
    • http://nogojituwizax.epizy.com/81428768572.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/dota_2_axe_culling_blade_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/mupovusime.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_off0000e0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D0 5148 bytes
SHA-256: 8a953c45b574438275cf7dea7a4f44e2a355553e305a8ffb6b9522252b395b19
font_01_sfnt_off0000f264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF264 10928 bytes
SHA-256: 6bd071b4b2912a4c7a69e1eea66b7e7d8d34ff0c40038fe58683c03a624e66a1

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