Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a565f3b84f4530…

MALICIOUS

PDF

72.6 KB Created: 2021-01-12 12:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d746268e5a8ff9ce238b0ff4e59b8892 SHA-1: 32266679f106382e68d0229f1838bdea0f6fe1bd SHA-256: 59a565f3b84f45300ca27a6654ea4b5590499da2f86574e5f7d28b83cd369968
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, with one notable URL being trafffe.ru, which is likely part of a link farm or phishing campaign. The document's structure and the presence of numerous external links suggest an attempt to redirect users to malicious or deceptive websites.

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://trafffe.ru/aws?utm_term=cholesterol+guidelines+singapore PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413112/normal_5fa955d0a1aa8.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxofepure/aAjkgja/13195764502.pdfIn PDF document text
    • https://site-1168410.mozfiles.com/files/1168410/945536266.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/gg68ieu/dodgers_last_world_series_game.pdfIn PDF document text
    • https://site-1168349.mozfiles.com/files/1168349/north_south_expressway_malaysia_exits.pdfIn PDF document text
    • https://cdn.sqhk.co/zapadenom/R7KNrOm/football_3d_game_for_android.pdfIn PDF document text
    • https://xapilupu.weebly.com/uploads/1/3/4/7/134709440/2c1afa3341ac9.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/A6jJhhr/invasion_modern_empire_cheats.pdfIn PDF document text
    • https://tukumexof.weebly.com/uploads/1/3/4/7/134721389/103a68.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/pazatuv/modern_talking_brother_louie_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/mathematical_statistics_2.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/76956633532.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/bangladesh_passport_renewal_form_abu_dhabi.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_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 5124 bytes
SHA-256: 105c52ecc32bba696d5533eb26a65130910a3ea0ad46437d162df15f2d816ca4
font_01_sfnt_off0000f282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF282 10136 bytes
SHA-256: c57eae299ac3e1dc1e0ebbee8b425300d3b3934682ca81b410608e8f0a72fefa

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