Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f4f16f5d1628a4…

MALICIOUS

PDF

69.5 KB Created: 2021-01-05 10:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0c0e277e57d1419ea4d016abd1a04328 SHA-1: b101d1fdaeb548274d447e36f2b1d3372a9e8b7f SHA-256: a2f4f16f5d1628a49e3d9798ad0433981731bc7760480c70116bbbc5abc1e642
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many pointing to other PDFs, suggesting a link farm or a distribution mechanism for further malicious content. The primary URL, https://traffine.ru/123, appears to be part of a lure to download the PDF, likely for phishing or malware distribution.

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://traffine.ru/123?utm_term=the+immortals+of+meluha+book+in+marathi+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f8708cd7e849.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/mebojiturebevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414851/normal_5fd95810dc341.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/c38f8a9ca.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/tizowodifi/kojomudez.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/vijibiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d80d44-f343-4739-812b-5e893ddd86bb/93291906970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abbbb97f-1e75-4f2d-84ed-5b483430ea2f/no-drama_discipline_handouts.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/38495335075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f67ab81-3495-41e3-bd5b-4914f612e38e/tewaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cedc8615-3ae3-4b6c-aaf8-b0beb1ccf241/xivitojug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d590933-f26b-4dfe-a0cf-bacc1d01d038/43562662426.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_off0000bd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD89 5528 bytes
SHA-256: 2e7deef0b6d4e6df7b9b0362f88a02144a7fe1c3bf60f4dc529a0c7cfc7d9272
font_01_sfnt_off0000d02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02E 10344 bytes
SHA-256: 59b6144bedba57d194a4c0948e2c795b10987128816c8f95bec15afb033c91e7
font_02_sfnt_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

Open this report in the interactive analyzer, or submit your own file for analysis.