Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7ba72c173008f2…

MALICIOUS

PDF

66.1 KB Created: 2020-11-24 07:34:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 71c824a8e77714cffbfb9566fe448265 SHA-1: ace4d7b2456f6f251f25a8e2fad8b2ea007d9e45 SHA-256: 4e7ba72c173008f269279fee3f00961657c68d4bb3c4bf6ccb48dcb5e81c23d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one pointing to 'trafftec.ru', suggesting a phishing or malware distribution attempt. The PDF_SEO_LINK_FARM heuristic indicates the document is designed to host a large number of links, likely for SEO manipulation or to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/aws?utm_term=believe+polar+express+alto+sax+sheet+music PDF link annotation
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/2300332.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d7dbf7d-96ae-4487-a4c6-12ca4e8b8fe2/69576162854.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/bidenag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514e9c03-a64b-443f-b6a7-49cd210d8a98/votonisuk.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/72901694732.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/supirun.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/chitragupta_puja_image.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b726dbb4-40ef-4417-a532-8233fc95b60a/64431523857.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/41703667729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bdff57-3c77-486d-a2d1-c79c8f88ffd9/34158424370.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_off0000b072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB072 5352 bytes
SHA-256: a66ca3c1d5271ffd225fff7afa9319ac1bc996ded885c5dc1890cbc4c98b0dbf
font_01_sfnt_off0000c280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC280 10492 bytes
SHA-256: e75b6505a89beef061ca6fcff527e4e7e8423a4ad105af8c919bf4e2ef0fdf47
font_02_sfnt_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 16120 bytes
SHA-256: 46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12

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