Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7903b3df6946052…

MALICIOUS

PDF

86.3 KB Created: 2020-11-12 22:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3c63aca39fe289c86d6b51883e728516 SHA-1: 9587709dfa1d73d118d9fe9e60f691e9f95d18c0 SHA-256: e7903b3df6946052403a0cdf0dc80465e5c6db877a4d2c1acb24883041d44e1a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. A critical heuristic indicates the presence of a malicious redirector link pointing to 'traffmen.ru'. While no scripts were extracted, the PDF structure and the malicious link suggest an attempt to lure the user to a harmful external resource, likely for phishing or malware delivery.

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://traffmen.ru/aws?utm_term=errata+sheet+example In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f95379660f40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f98723b1c56d.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/vexeliku/bolutovalenejozawezut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1252db62-2d53-4008-928b-f86a3a4d4377/xaxubakufepag.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/netabamoteg.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/asus_aimesh_review.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/martial_arts_salute.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/sworn_statement_form_2823.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/portal_gun_model.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/words_start_with_tur.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/lazurox.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/waduvozodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e268370-6782-459b-badf-e0b6707d33ad/70727096622.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/96940011941.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_off000115e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E0 5084 bytes
SHA-256: 8e0e6438df8f30db23b1eec6ca24c190434198cada7d9e8d1d35aefc55dcb32b
font_01_sfnt_off00012705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12705 11172 bytes
SHA-256: feddb74fdb2bc5adb5dd3cd9dce20037335384f4565946423e81e1cd25d2d4f9

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