Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a93ccd41fd39497…

MALICIOUS

PDF

69.7 KB Created: 2020-12-18 15:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2b49dc4ddf554e41a764f3a038522e34 SHA-1: 9de1ebd453fa98ebe1953f9721b0a349cc733283 SHA-256: 4a93ccd41fd3949725036d38134f47e9983b210d314a043e7906f7f3a6cd8f0a
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 for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=plant+assets+should+be+recorded+at+cost'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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://gettraff.ru/strik?utm_term=plant+assets+should+be+recorded+at+cost In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5fda5fcc4acd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459036/normal_5fb28381f124b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5fb7f928ca1b5.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/zuwosil/creative_writing_worksheet_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/94204912688.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c8f51452f90b7fe4c8fc/t/5fc0e22f9ee0f32b877339ca/1606476337121/scar_l_for_sale_california.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/bizusejuvonadaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/59334278872.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc368e8c6229360ecbce8a9/t/5fcb6ae685bc3a28a60a2eaa/1607166695078/gold_miner_undersea_2_player_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/44461639674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cccfbec3-8ec1-4986-a02e-0ad6d0d9ddb2/ser_to_be_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6c6580-6e8e-4465-8ca9-6b250de54022/ramoxovidenidelalaba.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_off0000d4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DE 5168 bytes
SHA-256: d37ba1e418acd02521ee40c3f32481c83da7a4f949d638435b08ea6ac82ef5c0
font_01_sfnt_off0000e662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE662 10292 bytes
SHA-256: 4e97e64cdb2fa9fd0c01b8fab9660c63d913f27d339fd3f6641f1e0c0a07e6c5

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