Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a3ca967ce9c977…

MALICIOUS

PDF

69.6 KB Created: 2020-11-24 21:35:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 135d454cde7c6bec85d6df1e27637532 SHA-1: 18aee9471d2f1010ee1e09386855e877bb5c9a9f SHA-256: f3a3ca967ce9c97746b640029811cb298ded27bd5d64a2b3e69ff9fda5f763a8
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards an attempt to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings are indicative of malicious intent, likely to drive traffic or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://trafftec.ru/aws?utm_term=qu%2527+allah+la+guide+en+arabe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f8a618b327d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457318/normal_5fb77e4d1a35c.pdfIn PDF document text
    • https://giwafadewixagi.weebly.com/uploads/1/3/4/3/134369241/zijazigizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424043/normal_5f9cc0989ae62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_5f977354602c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5fad4fc5e6110.pdfIn PDF document text
    • https://fiwisiroveton.weebly.com/uploads/1/3/4/3/134339953/kejewimadatoj.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/wegemebufojafak/atlantic_city_rail_line_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/dazaresurevisan.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/jilurajosimofuzuboremawez.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/visualizing_nutrition_2nd_edition.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_off0000d1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F9 5144 bytes
SHA-256: ac327afe40f666132af2bdc32004539a1ca242e02fcdf105b8b862c799ad4641
font_01_sfnt_off0000e371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE371 12364 bytes
SHA-256: 041c251dfaed38d0c7121d7a4710058250d33a36aac594c8314d413fe110c0a1