Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d19064644a3cf18…

MALICIOUS

PDF

76.4 KB Created: 2021-03-18 18:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 029e2c3e1d833d20d079610f6c446d3e SHA-1: 5992574a027ca143a5bc69133aa4c1c837ac360c SHA-256: 6d19064644a3cf1876993072fc71cbed53661d10903aea427c938e6664fd1d2b
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://fokemale.ru/strik?utm_term=windows+commands+to+fix+boot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371791/normal_603a75c220678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_601d684527dab.pdfIn PDF document text
    • http://pusutotini.iblogger.org/86001354347.pdfIn PDF document text
    • http://kupiokno.su/xemasotulanefaxogoloten76co.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/dc_motor_armature_reaction.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485929/normal_600164fc019e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_60186232d3801.pdfIn PDF document text
    • http://ericksandoval.com/sibumivakalujekewofebd5qa.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/zozidosas.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/chicken_invaders_5_mod_apk.pdfIn PDF document text
    • http://korixipedur.iblogger.org/potezomukisar.pdfIn PDF document text
    • http://genusadnlo.space/116776969323rkzn.pdfIn PDF document text
    • http://xolixelov.22web.org/blithe_spirit_script_free_download.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/98189513501.pdfIn PDF document text
    • http://uscreditreport.info/writing_task_2_topics_2018_with_answerst713g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_05c84909e6ac44e1955a167a419b4db2.pdf?index=trueIn PDF document text
    • http://tinerulekivu.rf.gd/how_to_check_my_dmv_appointment_va.pdfIn PDF document text
    • http://jakibijujaxaxof.rf.gd/what_does_a_middle_school_class_president_do.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/aha_guidelines_for_ventricular_tachycardia.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_e955882d39e1437cbb67d34ed2c34b46.pdf?index=trueIn PDF document text
    • http://serulasev.rf.gd/meaning_of_plastic_deformation_in_physics.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_d406428eebf2420da331d5fb5ef56686.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_38135b7a7ae444589bf45e110e2d284d.pdf?index=trueIn PDF document text
    • http://najijojovigom.myartsonline.com/hernia_inguinal_y_umbilical_pediatria.pdfIn PDF document text
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_36ee0c7f29574f6ebe9b90d824b0ff88.pdf?index=trueIn 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_off0000ec74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC74 5352 bytes
SHA-256: bf7291679c44303ba4992cbf23ec0513b7d0387e3fbb25f6cc5c107dab86d31f
font_01_sfnt_off0000feb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB9 10840 bytes
SHA-256: 9f09f4b7c6c0adde6eeed0a9f4e95ede22e05c2b695ef9f8938c82d1ffebd421

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