Malicious PDF — malware analysis report

Static analysis result for SHA-256 59de076f47401582…

MALICIOUS

PDF

78.1 KB Created: 2021-01-26 21:10:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eca63c648b3eda719f2267972f1fe509 SHA-1: e51af274f1bc19eff003fdd93598b4bb484a5ec5 SHA-256: 59de076f47401582467529fda88d2fa8e30abd8d55a5ed8833d426a634ac43ea
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, indicative of a link farm or SEO poisoning attack. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous external URIs suggest the primary goal is to redirect users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior strongly suggest an attempt to lead users to phishing sites or download further malware, aligning with T1566.001.

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://trafffe.ru/wb?keyword=november%202020%20calendar%20with%20holidays%20canada PDF link annotation
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/vawawagopubare.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/komuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475204/normal_5fde234b56bfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455639/normal_5ffea3fb4e3d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_5fda80af6b564.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/5240321.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/satuxedigizikak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5ffda3dbe8817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_5fdb82b3d7b9a.pdfIn PDF document text
    • https://jebigifapiw.weebly.com/uploads/1/3/1/3/131379276/levuzi_zatide.pdfIn PDF document text
    • http://xeralebusizuno.iblogger.org/28311093988.pdfIn PDF document text
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/0221569716dec61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476416/normal_600547e9251e3.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/vufuzewasi/sap_abap_certification_books.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/33922297928.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/animal_jam_apk.pdfIn PDF document text
    • http://zowipazivavi.epizy.com/17146293797.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/capital_letters_rules.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_off0000f3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A0 5816 bytes
SHA-256: bfe5388382f10b0e3b5929c8236e87fc8cb419633b202f7452565b330787ce6a
font_01_sfnt_off00010753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10753 10436 bytes
SHA-256: 382071dc456744732542e56b5cc1c13932730cf030d6e5b323d71fcc1b050636

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