Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a7cffe85417e7d…

MALICIOUS

PDF

65.8 KB Created: 2020-12-24 02:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 58b1a5b026e67b8eaf9853025367724b SHA-1: b9f628e1fd1f94e221cc76db36c3a80c2b7516ca SHA-256: 11a7cffe85417e7de75dd3522017da4fbe0a65563abdfe58c2302a903bdd5efc
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a suspicious URL, identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were extracted, the presence of a malicious URL within the document body is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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=ariens+tractor+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4377100/normal_5fce77d920363.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5fc87d948ea01.pdfIn PDF document text
    • https://cdn.sqhk.co/nogedapuvul/7fjg33o/aviones_para_strike_fighters_project_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f88ab7382c79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449422/normal_5fcd1a68aa15b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499002/normal_5fdb03fa00811.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ab94c26f-843c-4d49-800c-4c106480d0ac/68744627365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9ce35ce-7b58-4663-8dd6-6fe5287d1a3d/33153421832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7279a0f-d910-4e81-8ce9-daa59fea58cc/nixanazefuxevawenega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42602a13-3412-4c13-ac15-d873cffa4b5a/diary_of_a_wimpy_kid_the_meltdown_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144f9a8d-c9c6-4018-8494-6d9ec4361c7d/96743951252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd692bd7-9a65-4de6-9b46-7b8b7fbd890c/97533593022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec718452-2bf2-4555-9371-5175e18608ed/a_history_of_art_in_africa_2nd_edition.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_off0000b90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB90E 4816 bytes
SHA-256: 88e8c0856a6dc4b424dc2737d67e66bd7f4d42251749a85de9089d14709d6903
font_01_sfnt_off0000c93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93C 10456 bytes
SHA-256: 738746d7c4b8456068c5dbe737bdcb242418a928e0a33bb3f0bbb9d551a04940
font_02_sfnt_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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