Malicious PDF — malware analysis report

Static analysis result for SHA-256 c244d98190d66ca8…

MALICIOUS

PDF

68.9 KB Created: 2020-11-18 09:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d5328f348bebc76c5fbf0ca1b661e6dc SHA-1: 594c9c9d7d838502f6580165fc6bf7ecc92c64ca SHA-256: c244d98190d66ca8d92b4e93a7d845870c33a40db8ce304c200921b1252d655d
126 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to mimic search results, specifically for 'Thor Ragnarok watch online free hd'. It embeds numerous external links, many hosted on disposable domains like Weebly, suggesting a redirection scheme to malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://traffset.ru/123?utm_term=thor+ragnarok+watch+online+free+hd PDF link annotation
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/4821008.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/1417df64c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5f9cfaa147224.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/6028b1.pdfIn PDF document text
    • https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/likakawezajur-tevurenozeb-josog-tazewedale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f9e1335deb0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f8c94236ab18.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/b384c2f023.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/voxoguvuwurazat_delusededa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_5fa49f16a7b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5f986f75df130.pdfIn PDF document text
    • https://baxojozejaxofo.weebly.com/uploads/1/3/4/5/134586757/zakowobirifis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f88f9f05517c.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/ganubifirigevi/anbanavan_asaradhavan_adangadhavan_tamil_full_movie.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_off0000d003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD003 5212 bytes
SHA-256: 509b317e9a48d781277adb437a4aea717d6f928b877a3299d955823c0e470a1e
font_01_sfnt_off0000e1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CE 10720 bytes
SHA-256: 14a1dfd56a383fdd5dce9d8fb109a03b642ea39e7c9d8792fa37ece391149b61

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