Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e2f4efa395b95b…

MALICIOUS

PDF

74.2 KB Created: 2021-04-16 19:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e25ded8a9372035f89a05c8987be09de SHA-1: 90f99487ebef8f0ad6a419ae559140644ac4c4ed SHA-256: 32e2f4efa395b95b6756361979709d0fa362f985b12b5bebea1a1ea271f3298f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, contains text suggesting it is a lure for a physics textbook solution manual, which is a common tactic to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=principles+of+physics+10th+edition+halliday+solution+manual+pdf PDF link annotation
    • http://tewosube.mypressonline.com/desayunos_saludables_para_adelgazar.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/jidokimoderibulifet.pdfIn PDF document text
    • http://theporte.xyz/gazapuzakiven1fkt1.pdfIn PDF document text
    • http://katermore.ru/super_mario_bros_2_3ds_world_4-1_secret_exit19pm1.pdfIn PDF document text
    • http://digovin.getenjoyment.net/lectionary_umc_2020.pdfIn PDF document text
    • http://bachanalytics.com/how_to_join_indian_navy_for_womensp8bp3.pdfIn PDF document text
    • http://zeruxejobimal.mywebcommunity.org/910417859.pdfIn PDF document text
    • http://reawolt.online/is_google_maps_api_free_to_useadrlq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sizikipap.epizy.com/50398862799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25102b6a-6d6d-4641-af48-07df421868ae/what_are_the_different_types_of_iphone_chargers.pdfIn PDF document text
    • http://dimexibagumaza.epizy.com/80736845096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/248b0fbe-4685-4a22-be6c-27976d4cea8d/dukanizeferapikutofelonew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb49b8eb-db80-456d-b9c9-e1c02db2bf09/xodixulalapux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec62a192-a76d-4a22-bc56-09bffbd253d9/covid_holiday_ideas.pdfIn PDF document text
    • http://beboxunedux.epizy.com/mezazubilenikutebavixamos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d024823-98f9-4cd1-a395-6bf98509df89/tanobegiwo.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/hoover_power_scrub_deluxe_carpet_washer_fh50150_replacement_parts.pdfIn PDF document text
    • http://zaposupi.epizy.com/58438316598.pdfIn PDF document text
    • http://zodofujeki.atwebpages.com/jenigad.pdfIn PDF document text
    • http://lavoxema.onlinewebshop.net/ejercicios_resueltos_de_bajada_de_cargas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1190d0f1-d7cf-4c3f-be75-476b1a5d8822/d_and_d_5th_edition_players_handbook.pdfIn PDF document text
    • http://gixufedexakav.atwebpages.com/wegezefuduvi.pdfIn PDF document text
    • http://xaterukojokose.rf.gd/weboruwuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31b35a6-4824-4618-805d-5724809576a7/ganaxezovesejobi.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_off0000e297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE297 5692 bytes
SHA-256: f241642179f72901866dafe54b4424f104c7e0025a83457aa0226ce9e491fe2b
font_01_sfnt_off0000f5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 10880 bytes
SHA-256: c5180a921ee1e0290cb8b5205c838ca1644c554963643d760b9b5942346ef287