Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c13440b8630dc0…

MALICIOUS

PDF

64.0 KB Created: 2020-12-02 06:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a9da4359f415b6c8c774352fcee3be14 SHA-1: 58001bdfc42b0dbe1d3c4d1eeb7d9de163047610 SHA-256: c3c13440b8630dc084fa1b0293cc34131d98c7672fe9c826c5f3f0c25933efe4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

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://traffset.ru/wb?keyword=but%20always%20korean%20movie%20eng%20sub PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5f8a6362e7685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5f8fc78c65700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448331/normal_5fc4549fd28b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_5fb3ecd9de8c7.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/xutomoxu/the_sniper_liam_o_flaherty_plot_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/raised_bump_on_top_of_foot.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/lokawamibejatebizegob.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/bochen_3296_w103_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/87685218686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/424cdc4a-936b-4485-bb33-22bf8d86e4d9/kamen_rider_zi-_o_flash_belt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768f7bb5-8533-41f2-8ca2-8a07b37c864c/rockdale_county_tax_assessor_search.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/renaissance_periodization_template_7chan.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_off0000b0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C8 3492 bytes
SHA-256: 4309faaf8cbbfa9d281d3c98add80cbd2766e4553acf26c033b20f2fdce88337
font_01_sfnt_off0000bd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD50 5512 bytes
SHA-256: bbd31288c7c5730fc4f3b046e38d0bf0c44df642887cba5f8c95761a4933a06d
font_02_sfnt_off0000d01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01C 10272 bytes
SHA-256: a48a3df7ad90f05a9129a5d732d27292e1daaea6a98a595c0ee37578bae3daf0

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