Malicious PDF — malware analysis report

Static analysis result for SHA-256 43606024982c13fd…

MALICIOUS

PDF

77.2 KB Created: 2021-01-29 04:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c786a9adfc248cfaa6c479fc51915480 SHA-1: 0632c385ae79432ac95e519530cd372b645a11ad SHA-256: 43606024982c13fd15642137ce961d4ba3e6b85657082a17461ca37006f761d8
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan-like behavior. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting an attempt to redirect users to potentially harmful content. The presence of embedded URLs further supports the malicious intent of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/wb?keyword=mp3%20music%20player%20online PDF link annotation
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/5784903.pdfIn PDF document text
    • http://fuwefepor.iblogger.org/82745890582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415937/normal_6010fe87dffc3.pdfIn PDF document text
    • http://zarabotok.space/gordon_ramsay_ultimate_fit_food8tm7i.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/8873807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481528/normal_5fd3163d80fb0.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/nopibokenewuv.pdfIn PDF document text
    • http://iranianvc.com/blood_pressure_medications_namess6hzm.pdfIn PDF document text
    • http://tehnikator.ru/ritual_de_exorcismoftlri.pdfIn PDF document text
    • http://centerverifybadge.com/83682948747al6qc.pdfIn PDF document text
    • http://pokemonrivals.online/clicker_heroes_treasure_chest_farmingnuf0k.pdfIn PDF document text
    • https://bejolikide.weebly.com/uploads/1/3/1/4/131437094/pilus.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/3519152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483365/normal_601336a9ccc68.pdfIn PDF document text
    • https://vuvuzuvikedatun.weebly.com/uploads/1/3/4/5/134529562/nudorokudakolo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tugupora.epizy.com/tobesife.pdfIn PDF document text
    • http://resaruxowepu.epizy.com/teaching_of_history_book.pdfIn PDF document text
    • http://zilidezokap.epizy.com/omni_antenna_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/48587479853.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/97516329744.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/46904500307.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/template_undangan_khitanan_png.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_off0000f1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BA 5348 bytes
SHA-256: 97d01265cbb31b3858df1fbe9b8dfbf46c3b7df70c22eee51d93c8a3be6fa6ae
font_01_sfnt_off000103e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E9 10540 bytes
SHA-256: 079a8cd21172e8431be7fefeee45a7ede90cc79b863349168ffc2728c8a62e9f

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