Malicious PDF — malware analysis report

Static analysis result for SHA-256 c723e4cfe5c6c3b2…

MALICIOUS

PDF

91.7 KB Created: 2020-12-31 05:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: be75c00a47d728580b17f0e00e296cea SHA-1: 94ccb80495a43e1073d47f1745485b581a928759 SHA-256: c723e4cfe5c6c3b214e2eb44b47c969c9dc426f806e90d59debf91efaa5eac31
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is a strong indicator of malicious intent. Although no scripts were extracted, the presence of the malicious URL within the PDF structure suggests it's used to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/strik?utm_term=grandparents+in+spanish+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5f955251d9a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5fa6acdeb4772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5fa7271689b3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451231/normal_5fa9411fdd170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f8b427e2d7ee.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://s3.amazonaws.com/firudegix/equifax_consumer_credit_report_update_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb4efc6-3077-42e1-8062-3393f5587067/4-h_in_bubble_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/temelefuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f64c72a-0934-4955-b0fb-1a15f2a98fbb/xokivilegox.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/11284198846.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/google_chrome_latest_exe_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2846170-3140-4e78-8510-a7afcdaee72f/dejogopusufowusifap.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/symbols_of_judaism_christianity_and_islam.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/autocad_2008_64_bit_free_trial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/540943b0-3053-4866-9ef6-059c1c835fca/ponds_clarant_b3_oily_skin.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_off00011cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFD 5048 bytes
SHA-256: 001d7b6db63744e674d838fff2cc901d0f2832ed0b9085a394e2b3340dccb9ab
font_01_sfnt_off00012df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF7 11076 bytes
SHA-256: 84888bb3351c78bc6387c5c24c2ae564c3e94c962ae0e96f4a49351f38191e60
font_02_sfnt_off00015397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15397 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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