Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e32671dfdca25eb…

MALICIOUS

PDF

73.7 KB Created: 2021-04-02 05:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6225d84583500ee2a667400db0ab6478 SHA-1: 73234e8766c6384b38072b3f4471b596684712b7 SHA-256: 7e32671dfdca25eb12c09b43241a4a1ec8c86b44ada75642409bc9f25e892dda
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a prominent one pointing to 'dugedepap.ru', suggesting it's designed to redirect users to a potentially harmful site. The document body, though heavily obfuscated, appears to contain text related to calculator instructions, likely serving as a lure to disguise the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=how+to+print+total+on+casio+hr-100tm PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5ffe0ad15b0c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_603e39fc86134.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/isLiiRl/soxuzala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_60449366db636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_602074ec46cb9.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/rhijfiS/whatsapp_web_messenger_rooms.pdfIn PDF document text
    • https://cdn.sqhk.co/buwaxaxodi/Qihihhd/ice_cream_van_music_greensleeves.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/53405218375.pdfIn PDF document text
    • http://dedotiroviwef.22web.org/prophylaxis_endocarditis_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493245/normal_5febde004186e.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/whirlpool_cabrio_washer_repair_video.pdfIn PDF document text
    • https://cdn.sqhk.co/dunuxorigu/ahhEyhi/50755223520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480876/normal_60140208f2af8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5fcefdd0c5d33.pdfIn PDF document text
    • http://tekirivira.iblogger.org/dashes_in_formal_writing.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/oxford_bookworms_library_stage_6_oliver_twist.pdfIn PDF document text
    • http://gofimowekes.66ghz.com/7979557398.pdfIn PDF document text
    • https://cdn.sqhk.co/kiledone/gDjfHgd/monkey_king_tea_number.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/94e087a2-a7b4-44e5-abfd-e42f3c9efd4a/radawutorof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da6d181-6f5c-4aac-8d4a-c6526bc0af02/how_did_the_hitler_rise_to_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03713c25-864c-4407-bc3c-9dd662566579/caracteristicas_del_libro_de_los_muertos_egipcio.pdfIn PDF document text
    • http://dujawupiraxep.rf.gd/botesowopizoxevubomidexor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1edf397-e7bb-4010-8b84-9034fc453854/tecsun_pl-660_vs_pl-680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2f8d77-cb9b-42d5-944f-3610431b0d7a/how_to_charge_vixia_hf_r800.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_off0000e143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 5452 bytes
SHA-256: ca60fb762749ca1d7b0f7ef0a64cb0589f72fcbb68e6e7504c2a02d43195d708
font_01_sfnt_off0000f3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B9 11048 bytes
SHA-256: 1803ee81dd5d1c3151d91ce36c9763d2f84f8d1c02a5b68985ef851b654ec4be