Malicious PDF — malware analysis report

Static analysis result for SHA-256 baef1c71e9eb705f…

MALICIOUS

PDF

78.0 KB Created: 2021-05-13 21:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9920051c680e9d1cfe7e424a8d67618a SHA-1: d0a3afbd1a6feacb1d8e57eb8efb3e81fcab78e5 SHA-256: baef1c71e9eb705f13ceeb5c43d56e01ff15b4e4dd79da3bf2a29f7a09567dd0
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The presence of a URL with a 'utm_term' parameter suggests a phishing or SEO manipulation tactic. ClamAV and ML heuristics confirm the malicious nature, classifying it as a phishing trojan.

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://lozipotod.ru/strik?utm_term=hunger+games+mockingjay+part+2+free+online+streaming PDF link annotation
    • https://lofugaliwowutuw.weebly.com/uploads/1/3/5/2/135299309/gijuxilamapubanat.pdfIn PDF document text
    • https://meruxanige.weebly.com/uploads/1/3/1/6/131636855/movumuporevi.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/lokikosevu.pdfIn PDF document text
    • https://vidajubobulixi.weebly.com/uploads/1/3/4/6/134650234/xelake_timipino_fifajexijiw_gedowali.pdfIn PDF document text
    • https://nefufepaxesa.weebly.com/uploads/1/3/1/4/131453268/8393049.pdfIn PDF document text
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/699c45a88.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/fjhhePc/vunebawokozinuwonukoj.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/8cphhGm/209437178.pdfIn PDF document text
    • https://cdn.sqhk.co/sowumavag/Q3hijic/exercise_ball_chair_for_work.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/QV5iblz/68531598808.pdfIn PDF document text
    • https://revoninutilira.weebly.com/uploads/1/3/5/3/135338282/rokuratotim.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/6524eef8-c128-4b29-86f5-edefff2e25e8/41544287261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad16fadb-6cf9-48bd-bf3b-6d08a70ea925/creative_sound_blaster_z_control_panel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c89dde-340b-4344-b3dd-8821c09dad00/nazizanetetitel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1863cf15-45f3-4474-9644-74e960a9ee30/35786722984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8dba658-67e6-47dc-bda6-6a116ded2781/percy_jackson__the_lightning_thief_2010_full_movie_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d66046c5-eb82-4c1c-8387-b2992e62d6ed/fitting_the_negative_binomial_distribution_to_biological_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c940caa-663f-4489-ae01-a49583457ca3/el_amor_en_los_tiempos_del_clera_pelcula_completa_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d93498-592d-4e90-9530-dacc326c8d60/health_economics_group_uea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ef7a67-f69f-40a3-a4be-2a15d152f4a7/pikonilalavagojulebiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaaf88f6-d678-4341-8414-f47c017e7cbf/trek_incite_8i_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a689a41f-f486-4cd4-aab3-c433c1cba6fa/thetford_toilet_faults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb299c85-ec25-443a-89c4-68b4cbc9527e/lususuwamizesewegejisab.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_off0000f2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E0 5668 bytes
SHA-256: 359ad0e933b9c5c0a2874b112e32a6e476cac00323430661e5277e8aa4777df9
font_01_sfnt_off00010635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10635 10716 bytes
SHA-256: 4cacf4c552b0077720a5f1cfb278684f09821045c8dd16f5004ecfdfc41b0157