Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e88473656884079…

MALICIOUS

PDF

69.1 KB Created: 2020-11-17 14:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 79f1fb0a9b4ef9d496431239ef0757b0 SHA-1: d5a60da1ce58117eee9c8620bf88b88e9478048b SHA-256: 6e88473656884079653780633121ed4e3710bc3a648513459bb36d37f6362c6f
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files. One of these links directs to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a phishing or trojan-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/aws?utm_term=performance+appraisal+meeting+template In PDF document text
    • https://mugilofovoki.weebly.com/uploads/1/3/4/6/134616553/999ce5e92.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pomaxa/air_force_flight_jacket_leather.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4412312-f452-47df-994c-d247555adcd4/best_rain_shower_head_for_low_water_pressure.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/trekz_titanium_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29858d68-eb9e-4ee5-8858-dbf82b977cc0/samsung_home_theater_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/43050481569.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/20115479176.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/lutheranism_101_the_course_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b091e6-ec2d-4863-ae0a-e59c3ef8e489/jinuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c652ed-22a7-46b4-a4fa-dd5e853edbad/star_trek_deep_space_nine_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8addfe-d49d-466a-8d56-0a0ead9f0221/lulezoxilididu.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/sajivonofe.pdfIn PDF document text
    • https://archive.acas.org.uk/index.aspx?articleid=1438In 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_off0000d368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD368 5336 bytes
SHA-256: 7148b8e8827939f75321cf176d9fb243c40c90ad2ccb5a9041eeb3df89dcac2a
font_01_sfnt_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 10152 bytes
SHA-256: e081df60e5dfc494f07719d2de2998249f19a3ec768562c31e3bbad50c9bde43

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