Malicious PDF — malware analysis report

Static analysis result for SHA-256 3006741cb13cc677…

MALICIOUS

PDF

79.6 KB Created: 2021-05-12 16:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8a6284cbea522ec511572d59b7c9ad72 SHA-1: b0d8d9341ac3d6af0b607e3c299664289670de7f SHA-256: 3006741cb13cc67751f73f0f7bee9274d8f094c3c39dc0ad1a4e857e6eff0f44
126 Risk Score

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 0.9991

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=whirlpool+washing+machine+reset+time PDF link annotation
    • https://cdn.sqhk.co/jitolado/g6kIii8/swamp_attack_hack_version.pdfIn PDF document text
    • http://dress-russia.ru/are_there_undercover_cops_on_snapchatauuhd.pdfIn PDF document text
    • http://seruvirokanajo.iblogger.org/mawuxulefuzutoxatonefadup.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/57215606217.pdfIn PDF document text
    • http://getfreecreditreport.info/92215549968c80bm.pdfIn PDF document text
    • http://business-open.online/93658695390vke0d.pdfIn PDF document text
    • http://nopezimugabotik.mygamesonline.org/convert_to_word_nitro_pro_9.pdfIn PDF document text
    • http://savadaqwe.space/crossing_positive_and_negative_jumper_cablesbqe7l.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/RjdGihF/64483732463.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/nebixoda.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/MjiBgcO/76794798047.pdfIn PDF document text
    • http://leadtop.co/875224487525hy4g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koriwironawuva.myartsonline.com/eaton_13_speed_transmission_fluid_capacity.pdfIn PDF document text
    • http://tuxefefili.epizy.com/muzimoxuxinurepezogunolev.pdfIn PDF document text
    • http://guzeberipavol.rf.gd/difference_between_android_one_and_android_9.pdfIn PDF document text
    • http://sevixazoma.rf.gd/bodybuilding_diet_plan_for_male_beginners.pdfIn PDF document text
    • http://wuragumok.atwebpages.com/direxu.pdfIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_9d00f53280624cf09abecf379891886d.pdf?index=trueIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_ef455b14926a4da1aff19981f8a13b30.pdf?index=trueIn PDF document text
    • http://xowobovu.myartsonline.com/xalozebowesosojanomo.pdfIn PDF document text
    • http://naburonip.myartsonline.com/aniara_book_english.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_bee58c31114844a986822f625715e644.pdf?index=trueIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_166c2f6ffd1745e69376c3f4edc5ece6.pdf?index=trueIn PDF document text
    • http://vogutuzalosomo.rf.gd/libro_3msc_3.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_off0000f749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF749 5452 bytes
SHA-256: ddc010b9e74a03b4395fc14203e84e6b4864a0c5932a6f021f2e355d56a1f8d7
font_01_sfnt_off000109c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C0 10908 bytes
SHA-256: ee5fc01d118c61aacc9603b6c38c635628ad915d17d29424e89d6a9a504035a3

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