Malicious PDF — malware analysis report

Static analysis result for SHA-256 a723502973fc7ee3…

MALICIOUS

PDF

83.6 KB Created: 2021-03-10 10:11:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1a62dd19b53d027885cd07c3da44d72e SHA-1: 2ab637cab1e1fb8a6050c33313e115cdb4fd5889 SHA-256: a723502973fc7ee3fcc4fbd94480b5c5242f7ae67de9debf3a4445edcdfec84b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file exhibits characteristics of a phishing lure, impersonating cloud document sharing services to trick users into clicking embedded links. Heuristics indicate it's a link farm on disposable hosting, and ClamAV flags it as a phishing trojan. The primary malicious URL identified is https://xezojetit.ru/wix?keyword=super+mario+google+drive, which is likely used to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/wix?keyword=super+mario+google+drive PDF link annotation
    • http://mowefopovog.mywebcommunity.org/nawotefixonujuk.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/vosekepeli.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/how_to_set_timex_marathon_watch.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/first_things_first_ill_eat_your_brains_song_lyrics.pdfIn PDF document text
    • http://ruvenebigolusep.mywebcommunity.org/35795889518.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/34628355768.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/xalafuluweruxopisek.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/que_es_el_dibujo_tecnico_geologico.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/marlin_336_serial_number_starting_with_mr.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/c5631f7b-f3b9-4a8e-8d9b-e900eb4ab60f/lokolawatapoxufevuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc5cfe0-2f8f-4e27-83b4-7bf953fc4282/joining_the_conversation.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/how_do_you_calculate_flow_rate_through_a_pipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3ea6bc-ae82-4b06-9723-c6836cf7f229/sawanaxorumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/326e8c95-c2e7-4eb5-ab66-3bd723c1ed89/46152329897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb302ef-05e2-41d1-8701-d00943f45678/which_of_the_following_parts_of_an_argumentative_essay_belongs_in_the_introduction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b565fe6e-1b14-469d-bc1c-588f0aa077df/5671135137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8088d0-7881-4e6d-86bb-752a66181d91/kedobutalem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65cce2b1-d437-4b1f-a73d-d5deac2e79c2/how_to_become_a_licensed_real_estate_agent_in_nc.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/40570386932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c5c953-c051-454c-9db7-af9ec12e03fb/26200931012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a970360e-0b47-4912-8447-b48f04d6dbe0/gigopamumopezuzonozot.pdfIn PDF document text
    • http://kopolug.myartsonline.com/al_quran_translation_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9f9ad7-40b0-49a2-a219-e009cf22968c/quadratic_equation_jeopardy_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56946794-d67a-4c88-a97f-f876a7affefe/smart_couples_finish_rich_summary.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_off00010b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4D 5264 bytes
SHA-256: 8872388d7d6ec8de683c6a0997c7087db7030d1557a494aad06ea95e36b9a0b6
font_01_sfnt_off00011d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D22 10368 bytes
SHA-256: 01b5e0753699eb2f8eebc68e9e019c31363d18ae53f17898b75f74a397904d21

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