Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ee5aeda1eb1627…

MALICIOUS

PDF

79.4 KB Created: 2021-03-02 13:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4e14a374b0424c8c2f0fe0b0a8304427 SHA-1: f46e0688d918d715f9522e49e5c95ba7a8832713 SHA-256: 73ee5aeda1eb1627bba5ce136370dca119d58652bb4dc990a0412c08e2496227
126 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable hosting services and appear to be part of a link farm. The primary URL, 'https://fokemale.ru/strik?utm_term=the+maze+runner+full+movie+download+in+tamilrockers', suggests a lure for pirated movie downloads. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/strik?utm_term=the+maze+runner+full+movie+download+in+tamilrockers PDF link annotation
    • https://suruwizad.weebly.com/uploads/1/3/4/7/134766156/fipaxubevifoluf-dexelafapadajog-kixuf-xopukoladukaf.pdfIn PDF document text
    • https://cdn.sqhk.co/fazologim/jbqYkia/60412295364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_601b615d1a31f.pdfIn PDF document text
    • https://sasikeruxet.weebly.com/uploads/1/3/4/8/134851076/kovokada.pdfIn PDF document text
    • https://nuvaxavixo.weebly.com/uploads/1/3/0/7/130738964/8697491.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461483/normal_5fc68e191573e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_603e1aed3ccbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_60154a1316a0d.pdfIn PDF document text
    • https://tafanavudijis.weebly.com/uploads/1/3/5/2/135299899/fb889503c.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/buwigavobuga_sitifagepila_bapexadi.pdfIn PDF document text
    • https://cdn.sqhk.co/zatuwifezub/jehfgjq/loxixatojemit.pdfIn PDF document text
    • https://lokuzovitopoz.weebly.com/uploads/1/3/4/8/134871506/nulekujijado_tabasaweget.pdfIn PDF document text
    • https://leneguvajetuse.weebly.com/uploads/1/3/1/3/131380977/fupolezuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://riwugiboturom.epizy.com/xukegej.pdfIn PDF document text
    • http://zuriromaruwo.epizy.com/40631296797.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_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 5476 bytes
SHA-256: 46613f6ee12bd4bc10dc4db216cea1bb93d42d560c2c77f589dca6ff85e7adf1
font_01_sfnt_off00010b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B18 10904 bytes
SHA-256: 3ec2c9382f2495234c7d1aa3690b7d1bd8ec7df8732075c0d51e6680c36ad350

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