Malicious PDF — malware analysis report

Static analysis result for SHA-256 87507336bbe3b18f…

MALICIOUS

PDF

76.1 KB Created: 2021-06-04 18:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b026bb40c40ddf449eece2f08ceb8703 SHA-1: 751dd3e598e26278bbe9797f20aff52af1ad4287 SHA-256: 87507336bbe3b18fcc864e0b8aa2a355fc719c5a656557ae25e76cea08d5fac8
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to disposable hosting services, and one prominent URL suggesting a lure for downloading a game. The presence of embedded links and the overall structure suggest an attempt to redirect users to malicious sites, likely for further exploitation or malware delivery.

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://coretry.ru/pbw?utm_term=gta+san+andreas+game+download+for+android+ppsspp PDF link annotation
    • https://xiworibamenu.weebly.com/uploads/1/3/4/7/134728691/4113994.pdfIn PDF document text
    • https://sejimewopokotas.weebly.com/uploads/1/3/5/3/135350214/dugomukijinivoj_gowuwamozi_jafegi.pdfIn PDF document text
    • https://nometiru.weebly.com/uploads/1/3/4/3/134379396/dagero.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/fc65e4f.pdfIn PDF document text
    • https://xipuruvu.weebly.com/uploads/1/3/4/6/134654852/fodipe.pdfIn PDF document text
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/1616d75277cbb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foziwedugumu.pbworks.com/w/file/fetch/144571068/lovedojuxo.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/f/ginijijitox.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/f/zenozexufisi.pdfIn PDF document text
    • http://mujusevo.pbworks.com/f/qcm_appareil_genital_feminin.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/f/gewuz.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/xemutozezikememalafewimop.pdfIn PDF document text
    • http://luwivaj.pbworks.com/f/61850751209.pdfIn PDF document text
    • http://nuwiwaweber.pbworks.com/f/how_to_remove_blade_on_circular_saw.pdfIn PDF document text
    • http://dibesusajob.pbworks.com/f/how_to_download_custom_gmod_maps.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/59418370352.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/japanese_pharmacopoeia_2020.pdfIn PDF document text
    • http://guronavageba.pbworks.com/w/file/fetch/144567684/csr_racing_2_apk_unlimited_money_and_gold_ios.pdfIn PDF document text
    • http://ritijix.pbworks.com/f/jabuseboworebuvuful.pdfIn PDF document text
    • http://povelin.pbworks.com/f/bushnell_tour_v4_patriot_pack_laser_rangefinder_manual.pdfIn PDF document text
    • http://pukagij.pbworks.com/w/file/fetch/144586569/69918661773.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_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 5484 bytes
SHA-256: 4961ee05e8aba73fca22d1f538db97a8f4cb4956bc01cebd8b2deaf617940480
font_01_sfnt_off0000ffed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 10148 bytes
SHA-256: 39a3a45ff439babfdf2c2ed97ac2bada20b06defaa03e877b4c79561928be9ec

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