Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54a4aa63d7b0e6d…

MALICIOUS

PDF

89.1 KB Created: 2021-04-12 10:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9e0b8b7bcbcde51bedfb4b410540a8ed SHA-1: 552fa2d55d5d0c3ca14fba04d7e8ec0165880411 SHA-256: f54a4aa63d7b0e6d57d5db5227a7812e9bc327913c852ee71bd431b0ec4f8910
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary malicious URL identified is https://botokaw.ru/strik?utm_term=behringer+xenyx+1202+usb+manual, which is likely used to host a malicious payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=behringer+xenyx+1202+usb+manual PDF link annotation
    • https://cdn.sqhk.co/gukokefa/jchIQjc/5034331176.pdfIn PDF document text
    • https://cdn.sqhk.co/nulaliki/jgXVjcV/77633172254.pdfIn PDF document text
    • https://cdn.sqhk.co/rijizedot/gM2heif/lakixim.pdfIn PDF document text
    • http://italiahot.fun/jovibopejoborugutupapasom23m0.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/iiijhW2/staff_appraisal_form_template_uk.pdfIn PDF document text
    • http://info-pages.ru/pro_ad_hoc_server_ip_address_ppssppkczp7.pdfIn PDF document text
    • http://pusaburuku.22web.org/dream_girl_movie_songs_2019.pdfIn PDF document text
    • http://xonibiz.22web.org/dukimajininalur.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/8543721f-261f-41f5-9bbc-2b2dd6f2e00c/55943506272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13fc642e-6d64-420e-85fc-48ceed83f010/95685599828.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/samsung_secure_folder_alternative_android.pdfIn PDF document text
    • http://najaxobefirag.epizy.com/53045696228.pdfIn PDF document text
    • http://bixerexexotepe.rf.gd/48971189772.pdfIn PDF document text
    • http://telowipopu.rf.gd/factors_affecting_drug_bioavailability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54de0189-e85d-4a28-9108-0c0a59c44558/85161554603.pdfIn PDF document text
    • http://gadusevi.rf.gd/accenture_aptitude_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f37580-55c5-408d-9391-9639e43a61ce/gegukiravonapezubikegu.pdfIn PDF document text
    • http://rugunazivesix.rf.gd/getemomerupe.pdfIn PDF document text
    • http://jogered.rf.gd/how_to_set_a_utilitech_outdoor_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b488d33-0e16-4d5f-b997-b1c63f0465f5/60865991138.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/xagagoxubedugizo.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_off00011c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C90 5784 bytes
SHA-256: 27f9d814f9c030f4dda72717d6a8afae7dbcc1b0e2736f23d1073b8f64f59552
font_01_sfnt_off00013027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13027 11412 bytes
SHA-256: 86fa334d70b4729d093046acbf8648c445230e0d62697928b03fa6dac8c7de5f

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