Malicious PDF — malware analysis report

Static analysis result for SHA-256 043e798edb191f1a…

MALICIOUS

PDF

74.9 KB Created: 2020-11-24 05:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c8fdd0e84c00cbd91080ab86d289c274 SHA-1: bc84d2d46fdaa708e275dfe4df26c950ff4ca6bd SHA-256: 043e798edb191f1a1516b8d2c316bf596527bd0eb1ddf90464adeb44c8704bcf
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, including a link farm, suggesting it's designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, appears to mimic search result content, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=adyarathri+malayalam+movie+songs+free PDF link annotation
    • https://xolawawasaxigu.weebly.com/uploads/1/3/4/5/134587427/nurujo.pdfIn PDF document text
    • https://tototatinup.weebly.com/uploads/1/3/4/3/134332383/94b48cce167d.pdfIn PDF document text
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/6692686.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/jujojomojemiz/35064146139.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/symbols_of_huck_finn.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/building_construction_specification_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/robotics_engineering_projects.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/iphone_8_plus_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf660d72-e236-43c7-adac-0c3629c626d5/zitipinivejediz.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_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 5472 bytes
SHA-256: 50f2a7e8f1eb84ca51b0de02f0c6f0b0a9fc5ba6e5186251756f8b5864b14135
font_01_sfnt_off0000f983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF983 11048 bytes
SHA-256: 6620c6e407f993b2e2e6f2c36c05ccabb6e7f7cba9cb088562fc5c64a2ab0139

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