Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf4aeadafa9c88e…

MALICIOUS

PDF

68.2 KB Created: 2020-12-18 03:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 907957d5f380b713728c85a2c304c98d SHA-1: 1e2363114c5c828ad54d75e47847ce5994beb1e9 SHA-256: 0bf4aeadafa9c88e356e97852ba3a086b54bd7725c60ea190c103ae90e88e7ff
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a large number of external links, including one pointing to 'trafffi.ru', suggests a phishing or SEO spam campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to distribute malware or lead users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=mason+high+school+ohio+teacher+arrested PDF link annotation
    • https://xamorodedas.weebly.com/uploads/1/3/4/7/134714841/1258725.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/9015792.pdfIn PDF document text
    • https://soxuwewoduxewu.weebly.com/uploads/1/3/4/0/134042667/nogaxenavilatak.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/2692020.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/87fef3be-be6e-462b-a86f-738717b8d982/sting_jude_watson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438867dc-fec9-4abb-9db1-4c627c72bbbc/spotify_premium_apk_mod_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/area_of_parallelogram_in_vector_form_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594880af-42f5-44de-8af7-5823ac2af360/sarugusudube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba1fd2b-1e2b-47d7-8636-ec5b20d1fb2b/baby_moccasin_bead_patterns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc05996-33c2-4a5e-abb0-720f01c5c005/cooks_signature_coffee_maker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8a389b-4307-49cf-8a1a-3cfa4420ef8e/220818047.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/manual_actionscript_2._0_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e257f796-ad95-4fdd-89fc-27a772a71557/damawo.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_off0000cc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6A 5208 bytes
SHA-256: 7be566fd2ff9345cd32de5a2f4b70d1956795fb448133c12f5d1bcfa0b79617a
font_01_sfnt_off0000de20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE20 10640 bytes
SHA-256: 375fdbde255ca3db4cfc19b6eaf280c2179d00b13951e53b7ba021f2a14fc27e

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