Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64f97eb99af7eda…

MALICIOUS

PDF

78.8 KB Created: 2021-05-10 02:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29b51b4ccbfe76232287ac2f1f2f10e7 SHA-1: d95aab888e57eac2f08e7dedcbea1e1425a7f929 SHA-256: d64f97eb99af7edacf6cf05b970dc1d9319106d17c2e77e113ce2dc53c518820
126 Risk Score

Malware Insights

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

The PDF document uses a lure related to 'Bissell little green proheat turbo brush carpet cleaner instructions' to trick users into clicking on embedded links. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, with numerous distinct hosts and UTM parameters suggesting a phishing campaign. The ML classifier and ClamAV detection strongly support the malicious verdict, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/strik?utm_term=bissell+little+green+proheat+turbo+brush+carpet+cleaner+instructions
    • https://cdn-cms.f-static.net/uploads/4403415/normal_603b3bcb60873.pdf
    • http://peuer.xyz/2015_lexus_gs_350_f_sport_msrp25o3q.pdf
    • http://genusadnlo.space/what_is_another_name_for_the_conflict-handling_mode_called_confrontationx77mx.pdf
    • https://static.s123-cdn-static.com/uploads/4413368/normal_5ff578865a390.pdf
    • http://lapitubemexidi.mywebcommunity.org/16411389486.pdf
    • http://hookup157.online/90514406149vdag3.pdf
    • http://top-shop-store.website/vidobulusopawewasovalekijhjkrl.pdf
    • http://zathkatow.xyz/cyber_discovery_assess_answers_20181b1tq.pdf
    • http://ita-fitness.fun/tabasoruretinodigugudu7t5l3.pdf
    • http://storezone.info/what_is_spatial_arrangement_meaning96jkz.pdf
    • http://nukels.xyz/bujurigevevepabimefexifip7vryc.pdf
    • http://helper-badges.com/vifaxubasovesurozexajoloh4zwr.pdf
    • https://cdn-cms.f-static.net/uploads/4495246/normal_606a635476ed0.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • https://static.s123-cdn-static.com/uploads/4404733/normal_6007c3a292908.pdf
    • http://starkrobotics.org/waxominapapj03n0.pdf
    • http://lavka-karamel.ru/70678042849qer0g.pdf
    • http://fajufoturesu.sportsontheweb.net/82319580003.pdf
    • http://summerita.fun/mega_bharti_2019_online_form_date_maharashtraweyag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wefemabeni/boss_song_mp4.pdf
    • https://s3.amazonaws.com/wutogugej/kuxomokifusagarikegukuja.pdf
    • http://pexofapu.myartsonline.com/xotebokunilafazuk.pdf
    • https://s3.amazonaws.com/pibabopuduj/nosapulinadufaditite.pdf
    • https://s3.amazonaws.com/nuxomigo/bogapekesoliw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f9.bin
66b27ba1fa08d022f52f264c6a10f6ff4611bd0bac2a2b425257ca2d78052f6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F9 5268 bytes
font_01_sfnt_off0000f7c7.bin
15b0763eefe4ae944565f644bc50e1826687e8c32ce7e87dd70a3ba1bce10d6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 10908 bytes
font_02_sfnt_off00011cf1.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF1 4324 bytes

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