Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd2b2ead6b986d9…

MALICIOUS

PDF

77.0 KB Created: 2021-03-19 14:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc02e6ba1e848ba48d068dba41bd339d SHA-1: 991fb771981835fe08c4db7f431eb2203d817c2b SHA-256: 0bd2b2ead6b986d91fc75bd52449466ca3032a31d6c75360ec69dfab4613c7e8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=liftmaster+security+plus+2.0+learn+button PDF link annotation
    • https://cdn.sqhk.co/jimavidozeze/pcXjbij/ragdoll_simulator_2_roblox.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/gjegfX7/garfield_rush_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bisulalu/gia4heM/vexudurus.pdfIn PDF document text
    • https://cdn.sqhk.co/febutatesu/cKifrCu/walking_dead_season_4_episode_11_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/iiLiavl/dashboard_cover_car_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/3hhJidS/stickman_dismounting_apk_home.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/gYgdvii/28627218029.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/4yogjYE/vaxotusisefatejuku.pdfIn PDF document text
    • http://tarezirok.mypressonline.com/derojafebelew.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/vuzatefeziwexaxisime.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopetudivukuka.rf.gd/probability_sampling_and_non_probability_sampling.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/best_to_word_document_converter_online.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_de75cb67c0cb4e238b1ec9f4a6d03a8d.pdf?index=trueIn PDF document text
    • http://rawupul.rf.gd/wogonifobazeseminagukom.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_9d2a8d83dc8b42d5b2468910d9a4921c.pdf?index=trueIn PDF document text
    • http://wopojofa.atwebpages.com/resumo_atualidades_2020.pdfIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_700648c3bdcf42e0a5ff23e5bddaa2c6.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_9c5726a028a34295b5e988a1a24d1566.pdf?index=trueIn PDF document text
    • http://junedujivoxoz.epizy.com/sepawumebowowikisa.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_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 5648 bytes
SHA-256: 4340bf61a11e3cc71e0de5c2c25cafdb6a8f61d307ff838afece6a4e9ca56d5c
font_01_sfnt_off0000fed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 11724 bytes
SHA-256: 06e02b9a10aa35a4023c28133a4c50f02abe43560cc18ab4015a31c3fe38c255

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