Malicious PDF — malware analysis report

Static analysis result for SHA-256 d85c7207f1645472…

MALICIOUS

PDF

85.7 KB Created: 2021-04-20 04:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 327ea5e32579b6ac9d405fa3f5127f91 SHA-1: c366f92228b97b68b974b9b9435363beb136faf3 SHA-256: d85c7207f1645472742ae3fb27ae0844a9df588c9005fb48dad6f3eba0186efd
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 0.9994

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://dugedepap.ru/strik?utm_term=taco+bell+menu+2021+calories PDF link annotation
    • http://fesupopimos.66ghz.com/sejaluzigadoku.pdfIn PDF document text
    • https://cdn.sqhk.co/kulizuxekume/jAhj9QP/nuwikawepowufepamo.pdfIn PDF document text
    • http://xexawapo.iblogger.org/50684691783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480584/normal_60102b509162d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_604e504c58b77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_602722c9004df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_6006a99dbaeed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5feee2adccaae.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/CbT1ghp/everfi_module_5_credit_scores_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/fjhCqF5/wallpaper_app_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_41ddd322f415442ba1585c184d439e97.pdf?index=trueIn PDF document text
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_c1968eff14ba48c4b1d902f2f8ca4832.pdf?index=trueIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_376b301176da42599c81929273096acb.pdf?index=trueIn PDF document text
    • http://bodiluduf.rf.gd/akhil_a_movie_songs.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_fb857ba98f754ab3ab4e97ba1c3a3e80.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_6d7a602a0d5e49a5acdfda9ddb429769.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d7ac3f-37bc-47ee-b4e1-0e19e3849ef2/65998805919.pdfIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_be4d5d47464a4271bdd745f9e6c599d8.pdf?index=trueIn PDF document text
    • http://lilivuxaja.rf.gd/zicom_biometric_attendance_system_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc453e4f-ff54-4d29-bea8-b105207c463e/garmin_gpsmap_64s_price_in_malaysia.pdfIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_2038ce2ddfc743f08f6d4dd910e7070b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d548b25-a7f9-45ec-8eee-5ad45665f9a3/1707010882.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_b9b53fa1566f4172a40a0910e44719db.pdf?index=trueIn 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_off00010fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC9 5360 bytes
SHA-256: a09a650a4b837f35d57ec5b5cd9131f768f1735e7c68bdaccae9340a1151e7c6
font_01_sfnt_off000121eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EB 11236 bytes
SHA-256: faa9b79c7909c4dba078c104bfe699547df07d908d3ec36cb3aade012994f983