Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f3e236be091421…

MALICIOUS

PDF

70.9 KB Created: 2021-02-15 18:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a8bbc9e7771dc1aa58d7751e5d209470 SHA-1: 0740a00ff8e73b73c6e5825e05369ba291f87743 SHA-256: 59f3e236be0914218a505b3160a3a95e50405b105f1c077e533e677b85c51bb9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with one prominent example being 'https://jacksth.ru/wix?keyword=1911+trigger+kit+wilson'. This indicates a likely attempt to direct users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=1911+trigger+kit+wilson PDF link annotation
    • https://buketopol.weebly.com/uploads/1/3/4/0/134013372/2748d6d6ae87aa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_602018528b22f.pdfIn PDF document text
    • https://sasurejif.weebly.com/uploads/1/3/5/9/135966776/8ead0c194f1695.pdfIn PDF document text
    • https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/8675016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421944/normal_5fec48e896e60.pdfIn PDF document text
    • https://mifanupomiseri.weebly.com/uploads/1/3/2/6/132681757/353cbef499a121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/educational_games_spelling_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/template_ecommerce_joomla_3_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/mokipituwerunuwujegub.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/varirelibig.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/8162468180.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/android_studio_3._5._1_instant_run.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/ketogenic_diet_recipe_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/59113557101.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/my_talking_tom_apk_mob.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_off0000d9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 4912 bytes
SHA-256: f5b7e2a5cd4eb8b1a96f349d007f41812bcda048a58abd7f131de49d66b897f5
font_01_sfnt_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 10624 bytes
SHA-256: 8b4a278474f61bba14370cab070c535672b2deb2293a98db40b195389b9c36ae

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