Malicious PDF — malware analysis report

Static analysis result for SHA-256 df77687ceba16182…

MALICIOUS

PDF

73.9 KB Created: 2020-12-10 21:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c094e97654d48200c363e6529834349d SHA-1: 7069a007dd6bca4a8b94d35bc233b0dc5f9be96e SHA-256: df77687ceba1618216e217e5c573255519c42d8c0fac91b9af153a2db865e1b7
254 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including a critical heuristic firing for linking to known malicious redirector infrastructure and a high-confidence ML classification. The document body, though heavily obfuscated, suggests a lure related to financial instructions, aligning with a payment redirection scam. The presence of numerous embedded links, many pointing to PDF files hosted on various platforms, indicates a link farm designed to obscure the ultimate destination and potentially host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://ggtraff.ru/strik?utm_term=database+security+testing+checklist In PDF document text
    • https://denoxexulove.weebly.com/uploads/1/3/4/4/134457588/kegetumujap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5fa488bd297ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5fa20709417c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489255/normal_5fc5f1c04d9d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_5fa27b0f7e667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410717/normal_5fbdd667e1a74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5fbd00e6c06f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_5f8f91ba3f95c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_5f894374de1bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5fd1beea0c198.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/voramudotunawupiloz.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/26fc7d15-a301-45c6-aded-ae5e7289822f/sifogazeralaxitefisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb69eca-b8fc-49e2-9cac-9aefb3bc760f/jakurexiwaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30fc72b7-0f98-421b-b5bb-b931d0281343/68514672748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5220307-3151-446e-8d29-10f23c84b86d/83973573083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88c78eb-7d88-43f9-97d3-96e9b7941dd3/9564429618.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_off0000e305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE305 5368 bytes
SHA-256: 5fc7c7b2bad5d23747fc96771aa00a699dcd00d6fbe04dd738e18ca945af458d
font_01_sfnt_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 11116 bytes
SHA-256: e82d87df4a3e4d584ea1677c150ab9e5917e8b9bba59fc981be81e5e9d43ea46

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