Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b0a2b41ba098b3…

MALICIOUS

PDF

75.2 KB Created: 2021-04-08 05:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 08c2863337942d7a264d311c1bd5e937 SHA-1: 736a7a42b74284ee23d0dad9b844efa7c5b65e13 SHA-256: b0b0a2b41ba098b3c7307c4a1f979031a1237ea82c82f02629c719daeccbdc88
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable domains and are presented as downloadable PDFs. This behavior is indicative of a link farm or phishing campaign designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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://seumenha.ru/strik?utm_term=how+to+use+the+steam+clean+on+my+ge+gas+oven PDF link annotation
    • https://cdn.sqhk.co/xonaruvipiti/iciigjF/iowa_ag_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/iigfgcK/hard_boiled_crime_fiction_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/RijKdop/walking_dead_season_finale_watch.pdfIn PDF document text
    • http://hookup750.website/h1_zoom_driversomy5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_606764f6aace7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402963/normal_5ffa14d54ba8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460058/normal_5fe7929f4686d.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/igleifF/panzer_war_mod_installer.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/haqhfjf/galactic_conquest_mode_battlefront_2.pdfIn PDF document text
    • http://epipog.com/67522545348h1ia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_604ddb466cc17.pdfIn PDF document text
    • http://koreanluxe.com/24452817072vsrdi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_603ce79aee180.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/dvhdjg3/ancient_wyvern_gear_osrs.pdfIn PDF document text
    • https://cdn.sqhk.co/porekige/hehcV4M/dining_table_set_clearance_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/wejewenu/icgcwvy/moto_bike_attack_racing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://025b4bf0-2906-4f5f-8a0f-6d4b68fc9518.filesusr.com/ugd/148ee2_652aa2e0ea0b4beabc132b6ebd35edf3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remuv/18867984532.pdfIn PDF document text
    • https://425e2ee7-996f-4c6d-a593-b44a2a39b733.filesusr.com/ugd/bb05c1_e99780ad743e4e04b40d3f15fb70bf46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/ankusham_telugu_old_movie_songs_free.pdfIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_e71766d12b734ff08080d33d6f663634.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxapoz/49234852132.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/tosafiriva.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_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 5332 bytes
SHA-256: 67a96d1e5a8a90776f57f469e8493c8c99d3b498eab976ed2f09122c451bcf22
font_01_sfnt_off0000fb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 10532 bytes
SHA-256: 32b19f35974ed6a4f57ee535d669674657df3f03d019f20223362a9773a157ca