Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ea9eec0aef6063…

MALICIOUS

PDF

78.3 KB Created: 2020-11-24 10:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f4da8eee8cc34629af8f97c5a3544edf SHA-1: 7d0874ff84d6f124fe7499c3b5848fcf71803368 SHA-256: a6ea9eec0aef606307196c32e27fe2e482591f77bca09d2c03ab0d125182399e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/123?utm_term=modern+management+concepts+and+skills+14th+edition+pdf+free'. This URL is presented in a context that mimics a search result for a book, suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection further support the malicious nature of this PDF, indicating it's likely used to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=modern+management+concepts+and+skills+14th+edition+pdf+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_5fbc6f60e1e3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423442/normal_5faa7276e67be.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/4416923a-ecf0-4a97-b714-4c46c5301ff1/monster_hunter_morpho_hache.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/792b964e-3973-434d-87eb-2f1ceb1b5d98/3000_solved_problems_in_linear_algebra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59eb1c9f-6744-41ab-9a6d-09ad9938a505/mibalarewov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c3cb82-5290-47c7-b3eb-a3627f53d086/ulysses_alfred_lord_tennyson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3181ae0c-22a3-4852-801f-2137ef47abaf/37081579494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf51d33-ff96-4324-bcf6-578e40859d5a/najawatuxodidaniwawem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04dbab1e-576a-4365-b0d9-046f12539c9c/luguwojezividekega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64df1a85-a2fb-4bc0-a95a-626c805f663e/tame_impala_love_paranoia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e68ac334-38b7-4851-865c-4ca0b0f1bf8b/17805708465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f10c0d-8298-4c24-b588-1aa1d7fd65e5/bolasi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/9762570235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f27895-d9ef-4eb1-aab1-8fa8ec172c68/31598511356.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_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 5780 bytes
SHA-256: 806c6c5f78ce789532e99b95025c33d7a794435f44fefa5384d39b8035f2ffb5
font_01_sfnt_off0001030e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030E 11484 bytes
SHA-256: fa541a6d97777ea898e32b4e02eb9430f3eff7eac4e3611e572544f39bf2f13e

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