Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13f51ede2c50158…

MALICIOUS

PDF

76.1 KB Created: 2020-11-07 20:08:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6cb5ef215ea66e6a86211fbb4ffbf12 SHA-1: 73f377e107089fa3578df869cd2db47ac2c461b5 SHA-256: a13f51ede2c50158734f03f90b718882f1595f3d9d2140e648cbee16d29055d4
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or SEO spam campaign. The document body, though heavily obfuscated, contains a URL that mirrors the suspicious domain found in the heuristics, suggesting an attempt to lure users to a malicious site. The presence of numerous external links also indicates a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://traffking.ru/123?keyword=what+is+protocol+omega+in+travelers
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/8891762.pdf
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f87b4fa6e6eb.pdf
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5fa09c66e8777.pdf
    • https://cdn-cms.f-static.net/uploads/4417309/normal_5fa0a96963772.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d5677933-ba60-475f-b16b-30ca82976290/tournament_bracket_generator_random.pdf
    • https://uploads.strikinglycdn.com/files/6ffc8c96-74fd-4ae5-8036-0e3d3213dbe9/lusolurefaxasilotapifuvub.pdf
    • https://uploads.strikinglycdn.com/files/223fb023-8cdc-4650-b177-54d0a37261ec/filmic_pro_apk.pdf
    • https://uploads.strikinglycdn.com/files/272ef6e4-2030-42fc-8a9e-6ce987bb91ee/lilobarujes.pdf
    • https://sufuvuse.files.wordpress.com/2020/11/3074016501.pdf
    • https://s3.amazonaws.com/rodigapigeta/temutazitore.pdf
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdf
    • https://s3.amazonaws.com/betimugi/nofifuluwebudidaratidi.pdf
    • https://uploads.strikinglycdn.com/files/7eb6481e-b583-404e-8a03-1672b5d74d78/80398700128.pdf
    • https://xelinatuki.files.wordpress.com/2020/11/12873235441.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2be.bin
1dee5d270090b7b6db1f41331b84bf326941cabc83be12dd85411ebec4b07684
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BE 5420 bytes
font_01_sfnt_off0000e512.bin
5909b341bed2020d2e356becc860a94a5f84b714cd64c67effb04e733d19114b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE512 10992 bytes
font_02_sfnt_off00010a65.bin
108a9060536f7977f7009cf22ec96c59ab55cfdf620dd31e2e1ddeb63ce7f06e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A65 17500 bytes