Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe10c0b1bf65dad…

MALICIOUS

PDF

126.3 KB Created: 2021-05-07 07:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7560b6c621810940350496cf5ba5a5b3 SHA-1: ec16427db50c380b2ee37b126657f94688f3645f SHA-256: 3fe10c0b1bf65dad2cfbc788ae6c1ef04dc9b2436bb32957713f4a02f90fc9d9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains metadata related to its creation, and the presence of external URIs indicates an attempt to lead the user to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=proform+xp+580+crosstrainer+treadmill+parts PDF link annotation
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdfIn PDF document text
    • http://norasuzajo.mywebcommunity.org/strong_acid_and_weak_base.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/ajgMjhu/epic_games_launcher_won_t_open_on_laptop.pdfIn PDF document text
    • http://xevijuwidenuxet.mypressonline.com/definition_of_migrant.pdfIn PDF document text
    • https://cdn.sqhk.co/fopikudapom/dn2khia/gumball_3000_record_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/wewidipo/46lUjdv/25615188897.pdfIn PDF document text
    • http://daimontimur.org/how_to_align_wahl_balding_clippersg15uk.pdfIn PDF document text
    • https://cdn.sqhk.co/nilofixogezu/iiiiHzD/39763559414.pdfIn PDF document text
    • http://hotita.space/73737684217c8c46.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/CgciUXU/movie_premieres_2020_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/ThdicHx/77531246300.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/mCHPWhg/halloween_word_search_printable_large_print.pdfIn PDF document text
    • http://milanbeachs.space/how_to_strengthen_the_piriformis_musclel357l.pdfIn PDF document text
    • http://easylearning.space/jefotuzulumozeduweroklpd1g.pdfIn PDF document text
    • http://sedijonowet.iblogger.org/26682548910.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/LNjjggI/10245060364.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/a8780bc5-4f9b-4419-8d42-25b734364508/panasonic_dvd_s700_multi_region_hack.pdfIn PDF document text
    • http://sidijujaz.epizy.com/weather_report_for_joliette_quebec.pdfIn PDF document text
    • http://zonusaminotupe.epizy.com/43735189030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484d9e5f-b2aa-4d8a-b78d-66b5c90b72bf/volaturisirupagakoxuranoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2ba60c-25c9-4784-be66-8972c6b33cd6/12618846372.pdfIn PDF document text
    • http://tirigofov.atwebpages.com/40817161139.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_off0001b09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B09C 5828 bytes
SHA-256: 18c5845210a362af846036e2095d66bdb41dbda1e2af6fa54109a79956a6af5c
font_01_sfnt_off0001c466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C466 11264 bytes
SHA-256: ae2f37534647f19dadd456c7fd7404b279fe41a599c2ce603aafd47eea2e64fc

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