Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba54a6597024080…

MALICIOUS

PDF

95.4 KB Created: 2021-01-16 06:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d6f076c09855c7a07d9d88f338c374ff SHA-1: ea33929a122036b07acec696d8bc1ec65fdcd391 SHA-256: 7ba54a6597024080552921a5be6cb3a727ea1f2a752e092789a89e7a1aa8e010
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URLs, many hosted on disposable domains, indicating a link farm designed to redirect users. The presence of external URIs and the overall structure suggest an attempt to lead users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/123?utm_term=lavazza+super+crema+grind+setting PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413240/normal_5fee3f495fbf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427538/normal_5fb9392511838.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/chess_board_setup_pieces.pdfIn PDF document text
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/9116082.pdfIn PDF document text
    • https://site-1172154.mozfiles.com/files/1172154/72772426901.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/iAzif5g/dagikasutanorugireg.pdfIn PDF document text
    • https://site-1176842.mozfiles.com/files/1176842/gadgets_360_bd.pdfIn PDF document text
    • https://cdn.sqhk.co/litopozuf/fualihc/milky_way_miner_idle_clicker_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_5fa2ea592b829.pdfIn PDF document text
    • https://mutabezikubi.weebly.com/uploads/1/3/4/7/134739743/78be4ef6b8649.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/tazopaju/32473377373.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/deeded_rv_lots_tennessee.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A4 5412 bytes
SHA-256: 81a556bb6ed204c462a6c9170fd54d4efb3b4dc976f8391eaa7051984af6a5ff
font_01_sfnt_off00013409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13409 11652 bytes
SHA-256: 1087717b74f53444cbe640a3316be979afa915cd1ee2723ed68e091f166db3a8
font_02_sfnt_off00015ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BA4 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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