Malicious PDF — malware analysis report

Static analysis result for SHA-256 6428ab81bfe05c01…

MALICIOUS

PDF

69.4 KB Created: 2020-12-17 10:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e3d190e6c80c638fdd5fbec915ddc7ed SHA-1: bcd5d39122cc86436e9f01e8a49729b73d4e0f1a SHA-256: 6428ab81bfe05c0133d45845ea84fe2e661405bb2c8acb5069beaead45568191
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://cctraff.ru/strik?utm_term=pdf+mitologia+egipcia'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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://cctraff.ru/strik?utm_term=pdf+mitologia+egipcia In PDF document text
    • https://static.s123-cdn-static.com/uploads/4389104/normal_5fc4bfe6012a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381766/normal_5fc6cbe835dd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_5fbb2002a1279.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/zogopetej-xozarafugigu.pdfIn PDF document text
    • https://bawenijujobafo.weebly.com/uploads/1/3/4/6/134670929/weluverepebuvow_pifozuwutafip.pdfIn PDF document text
    • https://nigikejogu.weebly.com/uploads/1/3/4/9/134902550/bd0cc366e0211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470985/normal_5fb2d569ea7d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5fa0d83619b98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd06792edfcd2bda929fc9/1606223481887/what_does_creed_mean_in_religion.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfff689955c744b536924c/t/5fc5062dbc819f1cf476f1d4/1606747694005/what_is_tonal_harmony_in_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e74df9a-8251-4aba-b256-62549225dda9/kifovusanuvuvilotoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae40224-9d4d-4182-8927-2f432f5a1733/siwenenitosidonililolet.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_off0000d547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD547 5204 bytes
SHA-256: 990acfe3210fdd56cb6b950304595b6f84fd26551d9c45e0fdec25fab4e2cb5c
font_01_sfnt_off0000e6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 10016 bytes
SHA-256: 85c404258e253f7fb88aff4cf4f878437efae0c04683518a59f5b906a494d834

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