Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca920deb7eb63569…

MALICIOUS

PDF

76.8 KB Created: 2020-11-17 08:58:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 65ed51433cea8315a02deda2696f1738 SHA-1: 4c38879757c68dca03d7040e4d103b8f087e8a0d SHA-256: ca920deb7eb6356965684088e310d3315771314121ce19c6a0a1813a857e9e8c
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it hosts a large number of external links, likely for SEO manipulation or to distribute malicious content. One of the primary external URIs points to 'traffset.ru', which is suspicious. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the structure suggests a phishing or malicious redirection attempt.

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://traffset.ru/123?utm_term=a+plural+executive+is+formed+when PDF link annotation
    • https://kigivalivago.weebly.com/uploads/1/3/4/3/134337689/61686.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/9dd20d.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/savufowopixigumujaxixevir.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/combat_tournament_legends_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/69861699810.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/dr_phong_nguyen_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb27a6ca-2a35-4aed-a919-d648a27f2dec/war_thunder_helicopters.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/505631186.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/free_offline_niv_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d363f4d-8ba1-42a0-bd31-98e790b25acc/rajelenorikuvamilitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab2adf4-b508-454f-98ac-c5b4788ba299/40_sceptre_lcd_tv_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c882b654-24a8-4c4d-b6cc-50702dc237c6/75459067196.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/69609574088.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/16771838187.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/enlaces_metalicos.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/attribution_in_social_psychology.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_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 1528 bytes
SHA-256: ed92cafd901dd1cf1e35098023afc6358b03ff7238836c92b52e0ef4a2243c99
font_01_sfnt_off0000eee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 5604 bytes
SHA-256: b42584dc304d070de49b293698e00494da9544cf2c5f7638d40190e9b2ca51e0
font_02_sfnt_off000101df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DF 10320 bytes
SHA-256: 6ef4d9e7c4044d7a63f71b4b001c584fa4782d47e6dbdba92e1ef97fbb715dd8

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