Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab040422868b434…

MALICIOUS

PDF

77.5 KB Created: 2021-04-08 07:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 170e6975d49b1ace9b84684719b5f527 SHA-1: b32a1f326cc3d261bdf63de6fd8a355da47d0f0a SHA-256: eab040422868b4343af223dceb7b1a912f215836f246ff1563f9e71154169b92
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 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://lozipotod.ru/strik?utm_term=how+to+be+a+better+medical+receptionist PDF link annotation
    • http://luxasireku.sportsontheweb.net/los_7_habitos_de_la_gente_altamente_efectiva_critica.pdfIn PDF document text
    • http://sonasutos.mywebcommunity.org/bulgarian_alphabet.pdfIn PDF document text
    • http://vebemorotavo.22web.org/what_is_religion_based_on_your_own_understanding.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/jeQFfjd/k_yamet_kombat_arena_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/c0V5ji7/51908474052.pdfIn PDF document text
    • http://datingdate.site/how_to_get_a_replacement_1099-ssaxjjj1.pdfIn PDF document text
    • http://bluebadge-support.com/fidimudedajutokoraviwatrfq4u.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/pitman_shorthand_consonants_and_vowels.pdfIn PDF document text
    • https://cdn.sqhk.co/xijodepub/geCvchc/maze_singing_lucifer_season_5.pdfIn PDF document text
    • http://putinoid.ru/aiou_admission_form_continue_students_2019klce8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6608fc2-0119-4129-98f3-0e8a92baa405/jabuparukabijifeluwowu.pdfIn PDF document text
    • http://nozimazanu.epizy.com/nupiku.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/39104626979.pdfIn PDF document text
    • http://dalefiza.rf.gd/how_much_is_eyelash_extension_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbed9c03-ce1b-43a3-9edf-01dc104885dc/how_to_set_a_honeywell_rth2300b_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eef2aaa-da8a-4e95-88bc-02a08369de14/c6h6_covalent_compound_name.pdfIn PDF document text
    • http://jabukejezari.epizy.com/bitvise_ssh_for_windows_7.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_off0000f273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF273 5412 bytes
SHA-256: fca275c72e1ec7362b49e3a1c6258e13315f71f5c7fc95ba3340556345035570
font_01_sfnt_off000104ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 10688 bytes
SHA-256: a4555cafb2942b8b3d8593a62a06f9c21f9049a626cb584c3efa5161da48b54a