Malicious PDF — malware analysis report

Static analysis result for SHA-256 111b558d3ddf883f…

MALICIOUS

PDF

180.3 KB Created: 2021-03-27 09:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b4b2d5211f52a0a83e3266f819f6f855 SHA-1: 9c5c72fae138d98f1ba06b363d4cae313907ba01 SHA-256: 111b558d3ddf883f5ca30f95ed49312479cd6f800c19c5a11730535563775a67
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9965

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://vilenefex.ru/strik?utm_term=the+x-ray+control+panel+must+show PDF link annotation
    • http://pezuzifofuxi.iblogger.org/23144589607.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451954/normal_5fc9873691774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481821/normal_6058eacc74dcd.pdfIn PDF document text
    • https://cdn.sqhk.co/xakalodesi/NjjqjiH/word_family_books.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/bhhLgcZ/troll_face_quest_horror_3_level_5.pdfIn PDF document text
    • https://cdn.sqhk.co/wozobifanu/dheKic9/52505462812.pdfIn PDF document text
    • http://datab.vip/giganolelolufosu5346.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/XGEjb9Z/dungeon_maker_story_mode.pdfIn PDF document text
    • http://labincom-med.ru/the_missing_gods_2020_moviestc5i.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/ijzhdii/oximeter_oxygen_98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484154/normal_602282ac2d18d.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/ghfheC4/41884433016.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/hj6MhiI/wirulegur.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/sjaQBib/h_band_2._0_manual_espanol.pdfIn PDF document text
    • http://tizezs.xyz/tamilrockers_tamil_2017_movies_fulltb749.pdfIn PDF document text
    • http://esagafow.fun/xilixy4c4y.pdfIn PDF document text
    • http://cozyplacefor.rest/jijikuwumugetusor5t82p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://repajazofuwide.epizy.com/xirefoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0645e24b-724f-4dff-af19-747d2780483d/12244685538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bbafaf-2b5d-4384-8119-ed31d9ab4f02/pigididagonoxarutopi.pdfIn PDF document text
    • http://worurekebisur.rf.gd/capstan_equation.pdfIn PDF document text
    • http://torasimi.rf.gd/hematopoiesis_steps.pdfIn PDF document text
    • http://gunubaxerilol.epizy.com/apsacs_date_sheet_2019_class_6.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_off000288ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x288EC 5416 bytes
SHA-256: d425c85a47ef0d1c087acf89a9107dde377242ee5b2c38d4fd9da35add523aa5
font_01_sfnt_off00029b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29B4E 11552 bytes
SHA-256: 86c05582dc565bd65ac7ac1259f1c556b3d861cf94dbeda80f2d1c835a56faf6

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