Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e48ee1c76dacc78…

MALICIOUS

PDF

69.4 KB Created: 2020-12-06 05:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b92529e42d6779cd95d2fdd0de71cb38 SHA-1: 26e69430cf3b5adf9af890180f1a0f6c414d4c77 SHA-256: 6e48ee1c76dacc78d2b1b2570d63614477136e859eeae8403385bf64354c3f3d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=parts+of+a+microscope+worksheet PDF link annotation
    • https://sebidodeg.weebly.com/uploads/1/3/4/4/134438526/tofaxusutivarun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_5faa2ce0c9faa.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/bumeninif_jamibuxogepi_zubizofas_siber.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/328851324217.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/xaxew.pdfIn PDF document text
    • https://jodotabamusunew.weebly.com/uploads/1/3/4/4/134402052/2069287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391620/normal_5f8df13782b25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc27b67c14dfd36fefb9266/t/5fc6173c7acac6192a927dad/1606817596791/20517172660.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dde9d26ff1194f7385b9/t/5fcc44c65d2e6f3bda30d4a3/1607222471230/perfect_kick_2_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e5b8a3bf4b14aba92f9c/t/5fc7796fa907d7439cdc4bc2/1606908272176/droidcam_obs_streamlabs.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/48441477472.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1dca7849622016c3a880/1606229450551/30371609612.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfb17d334513fae41fd2d/1606220567742/zugigowuvotuguvibigo.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_off0000d1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1ED 5380 bytes
SHA-256: 85649ed75a443c948fb0fcada9fe0a397c109193cf7a3fcd3dfb8e6089481dce
font_01_sfnt_off0000e424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE424 10584 bytes
SHA-256: bd72350da8ca0ac23541291f78d06e29ed35a2c088dc5026387745f1ac1ad5b3

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