Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a89278ad2dfc7be…

MALICIOUS

PDF

77.7 KB Created: 2021-04-20 23:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 718100113fcaed7338af0a2bb6799efd SHA-1: 6ee0171bfa13682def8e080957715ed56277aa95 SHA-256: 8a89278ad2dfc7be096d745bc206789e8f61f72d3e0f40a2ea605cac44601c66
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one pointing to a suspicious domain ('mezovuduw.ru') that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to 'kundalini yoga teacher training'. The presence of external URIs and the link farm structure strongly suggest this PDF is intended to redirect users to malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://mezovuduw.ru/strik?utm_term=kundalini+yoga+teacher+training+new+mexico PDF link annotation
    • http://reduslim-sito.site/age_of_empires_castle_siege_android_requirementsu5b95.pdfIn PDF document text
    • http://usmileofficial.site/what_does_psalm_23_2_meanf5x2p.pdfIn PDF document text
    • http://usacreditmonitoring.info/how_to_silence_panasonic_microwaveg7lhk.pdfIn PDF document text
    • http://familyit.info/kamasutra_book_wikipedia_hindi_free_downloadl6f8e.pdfIn PDF document text
    • http://otomail.business/echo_pb-250ln_fuel_line_diagram7rgbj.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwozigef/40ia2jg/jutetinodulokurozugebuba.pdfIn PDF document text
    • http://menformula.xyz/gerontological_nursing_certification_study_guidegie9n.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/77574086294.pdfIn PDF document text
    • https://cdn.sqhk.co/jovuvufoxet/UgdLQhi/free_netflix_for_a_year.pdfIn PDF document text
    • http://meetsalle.xyz/35025800288iwqln.pdfIn PDF document text
    • http://fullhp.info/zavowinokamunexalopuradhwpkg.pdfIn PDF document text
    • http://govnosiakxws.online/braun_thermoscan_ear_thermometer_manualzg43m.pdfIn PDF document text
    • https://cdn.sqhk.co/sokulutesi/ggh5hhc/linkin_park_recharged_rar.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/c157f006-c2a5-4640-853d-f428d028afdb/whirlpool_duet_front_load_washer_clean_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79325388-0e79-4223-9619-6e0d0222ba37/guramuxilijaxunufora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc901c6a-f33a-4f5a-b6e1-396a22fbe4d3/45011026183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef0bd5e3-1c13-48ed-8fdf-db1a449e29fa/vesigalevebisofajiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c12153-071e-4ba2-ad94-6320cb230ca3/maytag_quiet_series_300_no_power.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/nccn_acute_lymphoblastic_leukemia.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_off0000efb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 5404 bytes
SHA-256: 836d1b01cc7d6369fffc3db02806a1ade1bc1c93f9c002cc02b22e5258e91e6e
font_01_sfnt_off0001020d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020D 11648 bytes
SHA-256: 481893c023fffc5bca0c1d56836f4e1c4abab4dc5ef7d510f9536ab48fb3669f

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