Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d1c1f9d346669d…

MALICIOUS

PDF

69.9 KB Created: 2021-05-24 13:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 49b4fb27b90b99c05cefcaa379fef4a9 SHA-1: 5d705d0fb19de81db8a729480af388a281f76b52 SHA-256: c9d1c1f9d346669d0f9d56a09947bd5c638ff3c8747c7e832b7d3e0dc136d493
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing campaign. The presence of embedded URLs indicates an attempt to redirect users to external sites.

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 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.
  • 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://botokaw.ru/strik?utm_term=bnf+for+child+2019+pdf PDF link annotation
    • https://fixojifuxupelo.weebly.com/uploads/1/3/0/8/130814076/9194029.pdfIn PDF document text
    • https://konovupifa.weebly.com/uploads/1/3/0/7/130775136/8c61c61f8b6b08.pdfIn PDF document text
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/vararufaz-tilesukepaxize.pdfIn PDF document text
    • https://xanuvewetarew.weebly.com/uploads/1/3/4/7/134732967/3429804.pdfIn PDF document text
    • https://sosedegif.weebly.com/uploads/1/3/2/8/132815053/26e85fab1.pdfIn PDF document text
    • https://birakegisepes.weebly.com/uploads/1/3/4/5/134597855/596981.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/999d3aae6663e3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf10cc7-9665-40f6-820c-066df7bfd187/what_are_interesting_boy_names.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/whirlpool_cabrio_gas_dryer_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/masiwerikup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec42550-db20-43ee-98c5-170616b0f3fe/serato_dj_pro_macos_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/bootstrap_templates_for_news_site.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/passive_voice_to_active_voice_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/3911576587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56846452-de94-4026-9114-ba19b6f334ba/xosetov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b696075-64fb-4a17-ba43-492c2d670dea/85303100990.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/behavior_meaning.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_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 5384 bytes
SHA-256: 760bcd4202714bd456b72085083c35cdcbb5705166d5ad06ff1cd22a0165c55a
font_01_sfnt_off0000e673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE673 10684 bytes
SHA-256: 04c77e610eb59be1d42a034991a78fe54013a454445ce4bd663719a0078cd8eb

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