Malicious PDF — malware analysis report

Static analysis result for SHA-256 f580e621715fef01…

MALICIOUS

PDF

120.9 KB Created: 2021-03-08 05:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 637695d958d2cfbb47f273f072cfa08a SHA-1: 9df3f772e10e59cfec8f9b0491168cd0b718db68 SHA-256: f580e621715fef01e4a5f4f6aab4e0d0fbb165b942e0e742b0b7330d07a1cb5e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9999

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://xajibur.ru/aws?utm_term=2003+yamaha+r6+repair+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4529281/normal_5fdc0c6a6f360.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/dr_myles_munroe_sermons_relationships.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/dodazaderopexew.pdfIn PDF document text
    • http://kamefutebiwef.mywebcommunity.org/zoom_g5n_effect_list.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/ifgeijO/lobster_trap_art_islamorada_florida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_602be7fe085d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417123/normal_60421a0defe59.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/heidVji/baby_jungle_animal_hair_salon_2_juego.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/tc-helicon_voicelive_3_extreme_vocal_and_guitar_fx_pedal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_60294f03f0f22.pdfIn PDF document text
    • https://cdn.sqhk.co/kejaxedusuk/TsihIq6/love_stories_on_netflix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pesetunal.onlinewebshop.net/sexofugogunejikumav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ec6bf3-268c-4206-afa8-6ae5231d700d/12491240961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d3d8fc-1cdb-4751-b34f-2023ac811643/how_to_program_a_traxxas_vxl-3s_esc.pdfIn PDF document text
    • http://xevivalekivo.epizy.com/70943358997.pdfIn PDF document text
    • http://sawujasasit.epizy.com/how_to_calculate_the_percentile_rank.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F43 5480 bytes
SHA-256: 5de93d256a289c080f4ce5d747c6fd2bbf7d32f30179f3fe735617a44a75444d
font_01_sfnt_off0001a181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A181 1660 bytes
SHA-256: 5bc29e957a7c2bfd94ca74f5be77f36b2748ef34258e2ee790736efab9ff746e
font_02_sfnt_off0001a9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9E2 15844 bytes
SHA-256: 4f6ef424d2958d0d51eda5f2de50590be98b2f4214b3c3c5fc7f679b7dd8fdcd

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