Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb40444baf4653d…

MALICIOUS

PDF

75.7 KB Created: 2021-05-13 16:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c0704bc17cd49e1301f073143d410f5a SHA-1: aeca5e906d3adfc4259112a029bb73fca29231ee SHA-256: dbb40444baf4653d49fd8073426de8b4f5805fc1612f2956ce5f943f00715bd3
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary one pointing to 'ponafet.ru', suggesting it's designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for link farms, reinforcing the phishing or malware distribution motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=does+arby%2527s+use+real+meat PDF link annotation
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/0917cc3c41.pdfIn PDF document text
    • https://xelegiri.weebly.com/uploads/1/3/4/4/134435730/5418150.pdfIn PDF document text
    • http://freshmind.net/demibovonemunowuvidkue78.pdfIn PDF document text
    • http://gamedv.design/event_planning_calendar_template_2019357xo.pdfIn PDF document text
    • https://dinadexoliba.weebly.com/uploads/1/3/6/0/136091941/nevaxoluti.pdfIn PDF document text
    • http://feedbacrnz.space/cub_scout_uniform_buy_online9pifw.pdfIn PDF document text
    • http://swiss-gear-top.xyz/73840216831b932e.pdfIn PDF document text
    • https://godobinoka.weebly.com/uploads/1/3/0/8/130815080/524e8a9e4c.pdfIn PDF document text
    • http://bakugutujom.22web.org/skripsi_kuantitatif_pendidikan_agama_islam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zosuvupetod.epizy.com/lotelesototasimegadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e17474-7d00-4ad9-9df7-4d075631fff1/itaste_mvp_3.0_pro_tank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2abbfdd3-09d0-4673-97df-93d68328b59f/badger_100_insinkerator_instructions.pdfIn PDF document text
    • http://nadurajamewe.epizy.com/marvel_strike_force_beginners_guide_2018.pdfIn PDF document text
    • http://daxizupalapa.rf.gd/kufulebilitavig.pdfIn PDF document text
    • http://bavalibonoz.rf.gd/sepamepozotuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe28fcaf-265a-4c17-9c93-5f9a8090fe60/is_lamb_gyro_keto_friendly.pdfIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_85612aee4f394a09bee0a246cdddce90.pdf?index=trueIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_812331a3ff2243668f413b8548005c11.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1262945f-68ed-446b-81e6-fec39accb260/mushoku_tensei_anime_release_date_episode_2.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_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 5108 bytes
SHA-256: eba365c6780e15d9f76eab13d732d263dc38757a5dbef53591edc01ddb0e5c5f
font_01_sfnt_off0000fb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6C 11360 bytes
SHA-256: 82ccd51f75fedd9deffcab104cee3f24b32e29e5fb82d8bba4db343c891bca77

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