Malicious PDF — malware analysis report

Static analysis result for SHA-256 5366647bca801b96…

MALICIOUS

PDF

68.0 KB Created: 2021-01-23 22:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ba096c803466697031ea0eda5f0d62aa SHA-1: 5c808e05b2968bc07258b3641230b4c7919809d4 SHA-256: 5366647bca801b9687ea06eb9dbbfae901ce72f988699802a66159a277f34b25
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a tactic to drive traffic to potentially malicious or phishing websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://trafftec.ru/wb?keyword=bubble%20bebe%20pet%20grooming%20oakville PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418566/normal_6004aedf45a43.pdfIn PDF document text
    • https://bajewenizuku.weebly.com/uploads/1/3/4/4/134475359/8e26fcdebc5bb1.pdfIn PDF document text
    • https://cdn.sqhk.co/bogebumemilo/5gdvnjd/zopozizidijowinox.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/icWjgc2/amazon_music_unlimited_individual_plan_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372983/normal_600002727b217.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/gcnlgfZ/dollify_girl_with_blonde_hair.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/gjuzjed/xezaledoxidofe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446270/normal_5ff42e6686909.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403947/normal_5fc69dd7df4b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481516/normal_5ffe959c1ae6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494669/normal_5ffa831737825.pdfIn PDF document text
    • https://likufugusatu.weebly.com/uploads/1/3/1/4/131406708/7361476.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387061/normal_6008f87f7a820.pdfIn PDF document text
    • https://xejoxobufedad.weebly.com/uploads/1/3/3/9/133997298/kopajifupusorukaxog.pdfIn PDF document text
    • https://baxorejo.weebly.com/uploads/1/3/5/2/135295822/selom_ziwiv_pisepujawin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wovisak/13230773659.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/vebigolakituzetuvupediw.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/selaze.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/bisofimemetamuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCD 5156 bytes
SHA-256: 780e8b66e166557c4a666455bd791cb61ac2f6b0af7d5ed9f3a1dde0542cf004
font_01_sfnt_off0000d141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD141 10300 bytes
SHA-256: a82e8552130c5eb1302bf63f2e2992af40f579833ee3d742e5da4b6d830e54e2
font_02_sfnt_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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