Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a4ff4e4bbce1db…

MALICIOUS

PDF

69.7 KB Created: 2020-11-24 17:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9b973cd51650b1a83bf9c5431e34144d SHA-1: ec59196a6a9d098d3ec61b12a892feca963fef62 SHA-256: e3a4ff4e4bbce1db65184be557b40f027a22a1bdc66ec28f468ff8c08b1a675c
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded URLs, with at least one identified as a malicious redirector. The presence of numerous links suggests an attempt to direct users to external, potentially harmful, sites, possibly for phishing or to distribute further malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/aws?utm_term=casino+games++offline In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_5fa1ff3da20c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5faee6bde23c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455884/normal_5fbb196795b6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_5fbac909a0330.pdfIn PDF document text
    • https://panirosarukiza.weebly.com/uploads/1/3/4/1/134132539/delomur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zugutixe/punasezexurekinam.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/14320226242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c1a17be-c835-4701-8455-926211ad2d3f/xetazuzuva.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/arrays_in_javascript.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb1f177-d6f7-4ace-bf9e-2db008789cf3/60346230791.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_off0000c78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78F 4720 bytes
SHA-256: 293a5802bd3adfd575ab58aa40642568d67ff6b612814098d23434643e7326f7
font_01_sfnt_off0000d780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD780 10320 bytes
SHA-256: b77a799f3bdff5d771ec82581a85bfb414608af5da098fa4099af448aa15eea4
font_02_sfnt_off0000fa90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA90 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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