Malicious PDF — malware analysis report

Static analysis result for SHA-256 205223914ae6aa04…

MALICIOUS

PDF

81.9 KB Created: 2021-05-12 20:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b799ad4973321ac35f24a8c6a0e0cea1 SHA-1: 99dd5ba600cbecbac16a55d3f5fd63ec504ad0e8 SHA-256: 205223914ae6aa04c9d60b7196eaffd41904d2e89853a75f67ca24334a46357a
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the sample as a link farm on disposable hosting, reinforcing the phishing/malware lure interpretation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=7+principles+of+universal+design+examples PDF link annotation
    • https://cdn.sqhk.co/zixifazod/egcMjiO/desert_rider_game_free_download.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/kugerataxos.pdfIn PDF document text
    • http://arthromedshop.xyz/subaneguwunovumrm8te.pdfIn PDF document text
    • http://re-prime.ru/black_and_tan_smooth_dachshund_puppies_for_salekyqgf.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/37404059925cn8ch.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://rojomitalo.weebly.com/uploads/1/3/4/4/134485393/ritivezowosatarajar.pdfIn PDF document text
    • https://rulamajovag.weebly.com/uploads/1/3/4/7/134764486/3905519.pdfIn PDF document text
    • https://cdn.sqhk.co/jewipabefoji/XjdHz5f/gantt_chart_free_template_xls.pdfIn PDF document text
    • http://felejus.iblogger.org/71483134616.pdfIn PDF document text
    • https://cdn.sqhk.co/supekolev/hjThacI/felegoregovikitugalawege.pdfIn PDF document text
    • http://azorocheat5.xyz/61778431224aauvh.pdfIn PDF document text
    • https://patijunig.weebly.com/uploads/1/3/0/9/130969449/vabodidesaf.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/hiijjcX/68701539442.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/assembly_language_programming_8086.pdfIn PDF document text
    • http://souve.me/31297728648dj8b1.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/pasanise.pdfIn PDF document text
    • http://instas.site/star_trek_the_next_generation_season_5_episode_19yicup.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/wheajeJ/83305453991.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/76643976432.pdfIn PDF document text
    • http://copyrightshelpcenter.com/cyberpunk_2077_hdr_pc_not_workingz9sjq.pdfIn PDF document text
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/2f5af99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wigezenefibi.epizy.com/luwetalipufuzovuganujari.pdfIn PDF document text
    • http://jagomizaf.atwebpages.com/27870344893.pdfIn PDF document text
    • http://dajivetu.rf.gd/guided_meditation_breathing_exercises.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_off0001013a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013A 5588 bytes
SHA-256: b30a4d6b5f0ea3827c51741f86a21f9b3595431910026cc00f73ebe7475e793c
font_01_sfnt_off00011437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11437 10464 bytes
SHA-256: c91b1a3a3e64d4c48f7424197706519d9bdbb2bbc81ea1e7abc245cb37140eac

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