Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8839a6e7707d2f3…

MALICIOUS

PDF

70.5 KB Created: 2021-05-16 00:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9307b5635cc20791cd4c4e79947e9fd2 SHA-1: 971cf77bc8ab09cb2b3de1a6cc678a8a981d50a2 SHA-256: e8839a6e7707d2f331a5bcd1046d3d5e0f052ec231a005e19e86aed43a3797b9
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 0.9996

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://jacksth.ru/strik?utm_term=king+kutter+finish+mower+belt+size PDF link annotation
    • http://tokexal.medianewsonline.com/investing_in_asset_backed_securities_fabozzi.pdfIn PDF document text
    • http://peludofnor.fun/sql_server_2008_r2_express_editionrbb6w.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/edjjYif/koduroki.pdfIn PDF document text
    • http://kinokaiff.space/xavewuvunitifi1swbw.pdfIn PDF document text
    • https://cdn.sqhk.co/xobupiba/cjg4wtR/71215562259.pdfIn PDF document text
    • http://filanion.online/34846019384cx9p2.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/wefajolupupesawa.pdfIn PDF document text
    • http://fedezin.scienceontheweb.net/toniboba.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/DgXcVgh/pulse_3d_headset_release_date.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/2005_honda_odyssey_pax_tires.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xukiwelufa.epizy.com/the_bakelite_jewelry_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199cbc85-b676-4ebc-8269-843c65151fb5/hp_deskjet_2132_printer_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb592c5a-ac45-40c9-858f-fcddfbc5f82d/49808843643.pdfIn PDF document text
    • http://pofomabagemekut.epizy.com/96955026523.pdfIn PDF document text
    • http://xuvufajozurez.rf.gd/balabofovujapodis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570844e4-40a5-47ec-a5bf-53f6890a9c45/how_long_can_a_centrelink_medical_certificate_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d918723e-186a-4024-a194-0bfec4f87e1e/the_carnivorous_carnival_taiko.pdfIn PDF document text
    • http://vesuduw.epizy.com/80872034237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee69042-a4b5-42f9-a658-393edcce9dc4/can_my_vizio_tv_screen_mirror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2060b162-d9ce-44ab-a547-396ce00708eb/48408370096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c2dce5-748a-45a6-b9be-1c591b2f467f/cub_cadet_rzt_50_parts_diagram.pdfIn PDF document text
    • http://sisakuwoxamale.rf.gd/zejamulisulir.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_off0000d554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD554 5284 bytes
SHA-256: a2be1551916353d3bb965c60c475b05ebd3d1f6b866076e72117a3be68aafbdc
font_01_sfnt_off0000e749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 10800 bytes
SHA-256: fd62a74ac2e40a52820713d149ea154806e504207fa860e70a1f5186494604f5

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