Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d0ce4a115f13fb…

MALICIOUS

PDF

76.9 KB Created: 2021-04-11 19:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2113326905792af65b7821cd12dd1184 SHA-1: 65e1d84f240540c7763ed6208657254c2c3910e2 SHA-256: 80d0ce4a115f13fb64b6ca6e3cd76e65412d27a3abdca7e46c2573dd2ac64b6d
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'xajibur.ru', which is likely used to redirect users to a phishing or malware-hosting site. The document body, though heavily obfuscated, suggests a lure related to 'bitcoin for beginners', aligning with common phishing tactics.

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://xajibur.ru/strik?utm_term=what+is+bitcoin+for+beginners PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369796/normal_606874cbe42db.pdfIn PDF document text
    • http://olx-delivery.cc/wepopofegovebuguwafidk8.pdfIn PDF document text
    • http://mybestchan.online/508675908744ob42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_6056b5c4b36e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488329/normal_6018d98316e44.pdfIn PDF document text
    • http://medgaj.com/mars_sextile_mars_compatibilitye7osa.pdfIn PDF document text
    • http://rasidafepu.mypressonline.com/hunger_games_read_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_5fe53f754c5ca.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/144502f0-d9ca-418e-bc74-b670fac52832/22805172556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b96025b1-a528-4257-9786-b31446816654/nefalatobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154185d0-8850-4476-b477-9368a4bdf37b/wujejoxepomejoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71331fd3-301e-44c9-a8d0-872c991f1231/biblia_de_jerusalen_online_portugues.pdfIn PDF document text
    • http://gakamaxoluzes.atwebpages.com/5351083329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/885f1b26-ead9-47af-802d-70c2dfc19631/82367837077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/414fa4d2-4142-4aa1-9531-bc6601e5d4f2/the_vampire_diaries_books_full_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f43248-b0a9-4089-9ce0-0223438ac0fa/xelexova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c1fcab-9544-405d-b1c5-9bf0c9ac2f79/what_is_the_best_wood_burning_stove_for_heating_a_house.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfce6abd-07a7-45b8-bce2-ac0159e6ce26/2005_jeep_grand_cherokee_laredo_bolt_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e852bd-affb-4d62-bee4-0e01943e7375/chinese_tik_tok_song.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_off0000f011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF011 5264 bytes
SHA-256: 09adee927a2c3d8d017dc10dc4b2b24a424798549a42be1f9cca268135704622
font_01_sfnt_off00010209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10209 10772 bytes
SHA-256: fe0499e322269b570aa76f989ba5fefc32ecbccf4085187acbb13563b37831ce

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