Malicious PDF — malware analysis report

Static analysis result for SHA-256 042d364a0b4c8a57…

MALICIOUS

PDF

83.3 KB Created: 2021-01-06 11:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 078abde680d2952489afac1dcf7df0b3 SHA-1: 6ce11202746c9ead30f05b047113f65a8fe02c9c SHA-256: 042d364a0b4c8a5731dc14e9dff7e6469ce3bb0df587f68e5daa2d575ee5123f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link farm and an embedded URL pointing to a suspicious domain, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or delivering a secondary payload. The document body's reference to watching a movie online serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/123?utm_term=watch+detective+pikachu+online+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448357/normal_5fdd414864007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420019/normal_5fe144552907d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479905/normal_5fca9b89d8456.pdfIn PDF document text
    • https://jexajopox.weebly.com/uploads/1/3/4/6/134656613/bf2f60f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5fba930609576.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/59afc865-bf80-49a5-948b-a3364f1cd4b6/47013483324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c664a4-de76-4729-a2a9-6e94aea4005d/6998277773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f220cb-fe2e-47d1-b90d-2f07deb49061/35524919522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3448f11-7e55-423c-9dc3-480c1e6cde8b/53836637580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32b87d3b-e234-4d7f-b32d-22e858c61731/what_does_the_world_need.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9092d926-0bca-4aba-89d9-c630c8a3aad6/turujimiragimagof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b9eb02a-9b3e-4c8b-82c3-698647232932/akbar_birbal_ki_kahaniyan_in_hindi_on.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_off000108c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C4 5120 bytes
SHA-256: c4909147938156f5dbf41bfea70e0a6f916da84380df10ed5c4337251cdca8d8
font_01_sfnt_off00011a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A38 11192 bytes
SHA-256: 140dc704268bda508f0920fa1322b87f39bd316786b582b500942e978d8629e7

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