Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f99d364f86cb3f4…

MALICIOUS

PDF

79.2 KB Created: 2021-04-22 05:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3d0cea8374cf039b20f288e6252b6892 SHA-1: e9c24d2fccd0973ec6cca0cdd797fea7afd29fd3 SHA-256: 2f99d364f86cb3f4bdbcd9214b4dbf07acafc47611d8e176cf92b127728323e8
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing or malware delivery link (https://soxebez.ru/strik). The 'SE_URGENCY_LURE' heuristic suggests the document attempts to create a false sense of urgency to prompt user interaction. ClamAV detection and ML classification further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://soxebez.ru/strik?utm_term=wahl+hair+clipper+guards+walmart PDF link annotation
    • http://rexevivejegox.scienceontheweb.net/11580581692.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/5433507330.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497638/normal_5fdf54d568cfc.pdfIn PDF document text
    • http://mbfsopg.com/best_emulators_for_android_2019nv189.pdfIn PDF document text
    • http://meetsucre.pro/xenyx_q802usb_manual_espaolxebuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454541/normal_6038daa32cbb9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuxokap.rf.gd/proactive_land_acquisition_strategy.pdfIn PDF document text
    • http://zibevili.onlinewebshop.net/94355199659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76360dcf-af41-4943-93b6-79cb50508cf3/enders_game_movie_download_in_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/triton_atm_machines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/602ee171-d8f0-4daa-aa11-307790b24943/jiridokukinagupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff8d8b7-cdef-407e-836f-f419cd014877/how_much_does_fedex_customer_service_pay.pdfIn PDF document text
    • http://borakenibafet.rf.gd/cancer_de_pulmon_incan.pdfIn PDF document text
    • http://solegevolet.rf.gd/where_to_buy_zf_transmission_fluid.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/sex_education_season_1_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/sakuzigofepilogumavaminot.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/juvufemej.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/14841144720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd92b5c-a3a1-402c-b1c2-bd705ac43786/ps4_error_code_50352-mw1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e18936-9b1d-4029-9adc-10e8e1956452/acorn_stairlift_180_installation_manual.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_off0000f50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 5592 bytes
SHA-256: cb30e2710f2bb691c8627a24b7268c3b2238a87077c84258e4c53c4a28065234
font_01_sfnt_off00010800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 11632 bytes
SHA-256: 638fc5bd8af5c49896e0644b735f27564a900195ff86642d990bdd4ae611b120

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