Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a49ce35358d29d…

MALICIOUS

PDF

85.8 KB Created: 2021-05-14 14:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6b7b6e454164eae7cb9b7f45ef7f6c05 SHA-1: 974bb4c17919da74859dd77fdf69eab93c35b337 SHA-256: 69a49ce35358d29dc00b0d04b29924e90356ce197ed6c607fb12707a60c11782
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=omron+bp652+hem-6052-z PDF link annotation
    • https://cdn.sqhk.co/jarebomu/hiUnCEg/brain_training_logic_physics_puzzles.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/EgeM4mC/my_singing_monsters_dawn_of_fire_prismatic_drumpler.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/ihchjh7/85097399707.pdfIn PDF document text
    • https://cdn.sqhk.co/mopijiluxu/jvEmpfd/minecraft_ore_mods_1._12_2.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/giHkogd/61305986629.pdfIn PDF document text
    • https://cdn.sqhk.co/fufeboxeri/0ghhdij/xowobevud.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/7nAIugg/rajirixezipilisapamux.pdfIn PDF document text
    • http://fojegasojabur.22web.org/colonial_super_retirement_fund_withdrawal_form.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/sj5ihhh/fufijomu.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/ihjfKeM/how_fear_is_used_to_control_the_masses.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/jgwzjdd/world_war_2_museum_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/jECiha6/bcbs_appeal_form_for_medication.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_b7472d0fe9f0422fa6aa0478a305e8e8.pdf?index=trueIn PDF document text
    • https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_9f4ab40a3fdf43188076c50d9e525a6a.pdf?index=trueIn PDF document text
    • http://nabepazefesuju.epizy.com/faktor_urbanisasi.pdfIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_eb895a4d5c4e45ed83b9f52c0b103af6.pdf?index=trueIn PDF document text
    • http://tujanum.rf.gd/kepisuzu.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_a24bd68af17942d2b370da8f0af137c9.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD428 12104 bytes
SHA-256: 42f5bf10c127d91226f73f731a4a449155175e7915128560023ff2081b47ea7c
font_01_sfnt_off0000fbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 5440 bytes
SHA-256: 8eb44045e16b7356c4d78d07381174a6bc4c6cd890c7ff1f07aec380c8b0ef2a
font_02_sfnt_off00010e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1A 11272 bytes
SHA-256: 827c53d189f58437accf7d589865926dfda7176bcf46935b81f152d261ff7ded
font_03_sfnt_off00013354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13354 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7