Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bd6df24531bf75…

MALICIOUS

PDF

74.6 KB Created: 2021-01-15 00:32:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 08ba9238479c7fad4cbe88279756eea3 SHA-1: 52ad223e0adeff5f0bbbc7a21a26d30e222bb648 SHA-256: 72bd6df24531bf7594827b577b9dbb831240a3c55e40fc67d02c3f2271f9d9cd
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services, suggesting a link farm or redirection scheme. The ML classifier strongly identified this PDF as malicious, and the presence of external URIs indicates an attempt to direct the user to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and numerous links suggest it's designed to lead users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://trafficel.ru/aws?utm_term=investigative+report+sample+crime+scene PDF link annotation
    • https://site-1172776.mozfiles.com/files/1172776/cover_orange_2_7-_11.pdfIn PDF document text
    • https://xunowarusaki.weebly.com/uploads/1/3/4/3/134371630/2178854.pdfIn PDF document text
    • https://site-1247443.mozfiles.com/files/1247443/12275477926.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/fjaQXhj/96897238610.pdfIn PDF document text
    • https://folatidaxewurel.weebly.com/uploads/1/3/4/3/134317863/sujax.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/af2210.pdfIn PDF document text
    • https://site-1174993.mozfiles.com/files/1174993/gamer_chat_sites.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/cjdghhd/ludo_king_play_online_on_pc_with_friends.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/xigutogodizide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483864/normal_5ff01afeb03c1.pdfIn PDF document text
    • https://site-1177759.mozfiles.com/files/1177759/tadpole_tape_cutter_video.pdfIn PDF document text
    • https://site-1251331.mozfiles.com/files/1251331/liwikupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_5f958475a9fd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE7 5036 bytes
SHA-256: 1674f60eba110de098327dfee1e3a2dabc3c1c239c4488890f76be96ad575dfd
font_01_sfnt_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 10392 bytes
SHA-256: 122e3fbaf4c094328f9d01dc15c91c719545cd73fd68bd698ec7f06c6bb0d304
font_02_sfnt_off00010f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F53 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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