Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd9080ee0dbef2c…

MALICIOUS

PDF

67.9 KB Created: 2020-11-20 13:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f63c64f68d8b8956415c2d7f37693d1d SHA-1: 38bb6c1e7858dd540ffb9213f70696cb30f79ea3 SHA-256: 6fd9080ee0dbef2cc6e7d701a75be88e07b7d0d0d7bab1118337fd5c01b132c7
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external PDF 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 likely a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/123?utm_term=oracion+por+la+sangre+de+cristo+para+casos+dificiles In PDF document text
    • https://tivaxuxilo.weebly.com/uploads/1/3/4/1/134131375/kosisexojatif_tunugu.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.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/18fb54c3-240c-4c9d-b17a-100cf3224cc5/8014597259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03de187e-08b3-4323-8bc2-e823efedf388/pillow_talk_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f2779c-e151-4433-b3ac-8e836df408db/50468113456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a115f6-bdf0-470d-8740-dace03868508/gapagozegur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fce7ad0-5d6d-4725-90df-2e28db537501/vuwixizologisixikerodosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9e4215-b06f-4ece-8537-5f321bd2acd7/hermetic_order_of_the_golden_dawn_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/31358288837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9396d40-6806-444e-b126-da368b6de07c/sikupogavuxevezapugise.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_off0000ca37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA37 5348 bytes
SHA-256: 15b9c7ab047197fae9fd617d7f4aaaa17ed854b7af3eec7e1c2b82229624dd1f
font_01_sfnt_off0000dc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6D 11132 bytes
SHA-256: 25305cb78010ab2a8f57e1f4213b9c017f3b6b64f293da2b975eb8f9b5ff517a

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