Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f5bd96e3ba30c9…

MALICIOUS

PDF

81.6 KB Created: 2021-04-10 09:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 68683f0f724023b4e86dad3079824228 SHA-1: c00967d6dbe16af26a913d3801eb03dbc35d7ab6 SHA-256: 68f5bd96e3ba30c937dd4fa6df30b10f9f9139f85201a10b4ef3a5def317ad34
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, with one pointing to 'seumenha.ru', suggesting a link farm or phishing attempt. The PDF structure and embedded links indicate it's designed to redirect users to potentially harmful websites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/strik?utm_term=windows+batch+programming+variables PDF link annotation
    • http://dolinunuridaku.iblogger.org/karodarelajozopesizadox.pdfIn PDF document text
    • https://xopapukewude.weebly.com/uploads/1/3/1/4/131408664/25dae043d37b60.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/idx5NWx/goxezowuzuku.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/33174370675.pdfIn PDF document text
    • https://rutebesutev.weebly.com/uploads/1/3/4/1/134131531/gotevo.pdfIn PDF document text
    • https://mifevulesitiz.weebly.com/uploads/1/3/5/3/135321383/bawapusewopivitu.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/jjgDwid/australian_national_parks_and_wildlife_service.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/caAiaUq/dallas_police_officer_killed_2020.pdfIn PDF document text
    • http://zobabikox.medianewsonline.com/mofesutepuzav.pdfIn PDF document text
    • https://dijemafewume.weebly.com/uploads/1/3/5/9/135992897/fetimux_rabonimofogowib_sivisu_kegelokavorupu.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/5027e390-dba6-432c-9d04-8994edd7cace/is_clover_pos_good_for_restaurants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57141ca-cde0-446e-a9ea-e4edee0fa407/pretty_little_liars_season_5_episode_14.pdfIn PDF document text
    • http://nedudab.epizy.com/how_to_get_monster_illuminessence_remote_to_work.pdfIn PDF document text
    • http://lenumizisil.rf.gd/49296572129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffbf0ce1-ba1b-4fe1-abb0-6550ee1cbdbf/how_to_reprogram_schlage_keypad_deadbolt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f12a588-4580-435b-8b3b-98d78c47edfe/mapa_forgotten_realms_3.5_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d11808-a6c5-4760-9ddd-51616ac210dd/lawn_boy_mower_model_10685_parts.pdfIn PDF document text
    • http://mobatujurital.epizy.com/statistical_methods_by_sp_gupta_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cac0519-8fe3-4a82-b6cd-bdbebf2ae671/81753680460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c2f4ef-8a17-4132-824e-5ba4dd50d300/17698163447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/467c7513-a274-4b71-8a10-4a7ed2f1a5ae/are_navy_seals_trained_in_hand_to_hand_combat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d621bd-584d-4e1c-98fe-1df411cd6d32/black_and_decker_digital_advantage_iron_temperature.pdfIn PDF document text
    • http://nasakitubaribud.rf.gd/63343814580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/686713db-4398-49ad-9b38-b43636ef4df3/zusugawupaguval.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_off0000fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 5792 bytes
SHA-256: 4412ec97d1ded858441073e836ed6b7ccebc782ac05d771bb3659dee49223a9b
font_01_sfnt_off00010ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFD 11508 bytes
SHA-256: 7717db67c11ab2aafab1282687091958e852d3ec8d433b7e207ae8ca50a0ce7e