Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b8ea9eff6a77fa…

MALICIOUS

PDF

75.7 KB Created: 2021-03-17 07:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7095758dac1d3755b60c78ab72bc2d3f SHA-1: e96f3abb7ff2671e8d40e7600b3452da40a307a7 SHA-256: 84b8ea9eff6a77fa70ed360612ce54ee487ba9540ee2a6512c15d6db0e37ba4c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary focus on directing users to 'xajibur.ru'. This URL is associated with a link farm heuristic, suggesting a malicious intent to redirect users to potentially harmful content. The ClamAV detection and ML classifier further support the malicious nature of this PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=kat+torrent+proxy+list PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410414/normal_5fe74e0b9584e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_603a0b35b813e.pdfIn PDF document text
    • http://pasendapp.online/turning_radius_formular3ne2.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/rinamumifitovopimatega9l4va.pdfIn PDF document text
    • http://meduduwaje.22web.org/24694410275.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449990/normal_5fdf93eb9048c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5ffdce211e9ea.pdfIn PDF document text
    • http://mailedflkf.site/stop_push_notifications_facebook_chrome_android7vv4c.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/b544a230-c322-47f6-9019-06f41575085e/lomosafowavozupularegod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f2002a-9d3d-41e7-80c3-1db36f9cb62d/big_little_lies_book_summary_chapters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ff4b69-e81b-40cf-b0fe-9d7b44534bb6/how_much_money_is_dale_earnhardt_junior_worth.pdfIn PDF document text
    • http://lofekelatek.epizy.com/sangean_rcr-5bk_digital_am_fm_clock_radio.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/slash_apocalyptic_love_album.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/borg_warner_velvet_drive_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b2042a-ee44-42ea-8df0-6edbccb7d4aa/jisax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04826bca-fa45-4c24-ad3c-d3cafa0e04ab/a_world_of_art_7th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad1b4fb-516b-493e-af27-1ebb63d3a58a/13438100962.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/cub_scout_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/tivaz.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/what_are_the_principles_of_entrepreneurship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4489c60-67f8-4467-8746-586c32b1effe/moto_360_2nd_gen_battery_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca0ed382-f9ec-45d6-9009-ba3feb77b54b/not_fade_away_tab.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_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 4952 bytes
SHA-256: 24aed5b7ec14922e65720783a8714fc109cf22c316e0aa9073e07757da8228cc
font_01_sfnt_off0000fcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 10768 bytes
SHA-256: b92d18f7371d05454beea2c812d6fd9710f3829e5eb23508dd0ec429196cf18d

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