Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c908cb1ea133a48…

MALICIOUS

PDF

70.7 KB Created: 2021-01-08 08:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4c608953075ce2cdec3c8ad58184d041 SHA-1: ec8083300c95aa4b9bf340bc3ab3863d4d485acd SHA-256: 3c908cb1ea133a4876b4f7865291ab9ee13c3bff9ed167abcec3dc8a96b4f344
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL point towards a phishing or redirection attack, likely initiated via spearphishing.

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/aws?utm_term=cara+update+android+pie+samsung+a5+2017 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_5fdc3f457cad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5f88ebc1cde53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5fdb0d9479fa8.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/XIFVF3H/old_tomb_palace_escape_walkthrough_part_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425211/normal_5fa4a2b6e205b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455901/normal_5ff0077a5d1e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420927/normal_5ff506bf108c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366623/normal_5fc66f943b771.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/paropabaru/rudolonuzej.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/nunulolovudesenujobak.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/69266955858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67271895-e965-49da-870d-8805ed2f3217/coordinating_conjunction_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/506212bf-aaff-4f23-89cb-c8f4a3eb25d7/rigs_of_rods_monster_jam_mods.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_off0000d795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD795 5680 bytes
SHA-256: bad5a3568b96a142a749c4331ec512e3fcd5a67f1b646cae406058d0c88bf377
font_01_sfnt_off0000eae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 10156 bytes
SHA-256: e664e98a1e593f9347bdb464272af8950a1095d3bb675d807516d7be02bd841a

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