Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab6bec846c9881f…

MALICIOUS

PDF

75.4 KB Created: 2020-12-24 21:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6648cad31c7e3f49845eab2de7573a4d SHA-1: 1eab7f5d6f7aaf38d928c67607128cd1c3e01875 SHA-256: 3ab6bec846c9881fe83a1ed554a7c49af74f5b05076bfbbee982ad812a927662
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external links suggest a link farm or phishing attempt. The ML classifier and ClamAV detection further support the malicious nature of this file, indicating it's designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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/123?utm_term=electric+guitar+with+built+in+amplifier+%2526+speaker In PDF document text
    • https://cdn.sqhk.co/risevejuxik/cgdjdbQ/rolling_stones_songs_with_color_in_title.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/tizedeniluxiz-gefowigujotubu-senunomikale.pdfIn PDF document text
    • https://wobafedufuj.weebly.com/uploads/1/3/4/0/134012960/gakosamuxabapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445325/normal_5fbce737ac59b.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/00272376-c108-43bf-a020-cf4d672b0a80/45679994222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1293c231-4b1b-4664-82f3-d38b46e0d3bf/five_finger_retelling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e95014d-72de-417f-a321-9bb19be98d4c/xadesojutewuwakumuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8348e878-f0e3-495c-b3b8-245e6ff193bb/lucy_tr_dublaj_izle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6c93ec6-a266-4056-baea-65c022fef4be/78183680499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f6ca96-af44-4776-857e-4da3276203d3/rirabodotegarenudix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d66397b-a265-4ebe-a90f-bd3dbcd78dd6/46734636873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df1379f-a920-4d20-9085-4f258c5fa62b/52721068509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0feab1-019d-460c-9f99-1b9e03a07521/tewaguponegaferibowor.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_off0000eb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3F 5440 bytes
SHA-256: 882270f105c603b770ba81ac1beb8e6a9a0d9fa09d963828a9c4fea47b4fb2f6
font_01_sfnt_off0000fdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB0 10336 bytes
SHA-256: f4d10f7330989fcec5adc71cc7320ec30c82d9c58bbf82564e645c732ec41004

Open this report in the interactive analyzer, or submit your own file for analysis.