Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd854e5c83d565b…

MALICIOUS

PDF

74.9 KB Created: 2021-04-20 04:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 91ab421e3e2efbcac3e20bb2fe04a313 SHA-1: da1294e6f1b6f037ee8d88b8a531589b217fe6e1 SHA-256: 0dd854e5c83d565b77dac711a2a2ef3e74c625d515500087d119eb064af039c9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=tom+clancy%2527s+the+division+2+gameplay+co+op PDF link annotation
    • http://the-english-temple.com/10_ways_to_cook_ramen_noodles_in_prisonmc06s.pdfIn PDF document text
    • http://fexevosekuzavep.iblogger.org/cessna_182_spec_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/ZkUmheG/86596252586.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/Tgibhhe/okay_madam_full_movie_watch_online.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/c0tXjan/nusowoz.pdfIn PDF document text
    • https://cdn.sqhk.co/lukulobu/ljgXl4W/bipagak.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/ahbnuKM/40860728145.pdfIn PDF document text
    • http://save50it.pro/how_to_repair_a_lawn_mower_cableeppyn.pdfIn PDF document text
    • http://remont-pc.website/bose_soundsport_tws_k2_reviewcgfxi.pdfIn PDF document text
    • http://copyright-services-us.com/what_personality_types_get_along16w8e.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
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_7462ed45d8524e149063313c7c816111.pdf?index=trueIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_881cc8f60faf44d3823b2e3396bebd46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/skyrim_how_to_learn_dragonrend.pdfIn PDF document text
    • https://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_ddf30949658548a1ba8c22e9fe6e5cc9.pdf?index=trueIn PDF document text
    • https://79f67b98-100a-41ac-8a2f-4880133f117e.filesusr.com/ugd/f12c90_b97edb15657343b0a9f6e626f9d506aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurafoga/riwuza.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/pages_flyer_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/fakanesogetanuwogokozeg.pdfIn PDF document text
    • http://bavipilebevim.epizy.com/this_feeling_chainsmokers_song_musicpleer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C7 5456 bytes
SHA-256: b44276db5c8aa4f107b55bcd6fbae9d28ec9858008ae433e11a0f814a91d57f2
font_01_sfnt_off0000ea42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA42 10924 bytes
SHA-256: 72e21a6d4e41949a7b97253892692dcf09d9592c5f7be751cea09e62a146b4ff
font_02_sfnt_off00010f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34