Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f7580e798d0bad…

MALICIOUS

PDF

83.6 KB Created: 2021-03-27 11:24:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 94e2d2f80ae0fda38746283801a65427 SHA-1: c8bff1768032f3603eff78a8fcee8d2efd43318e SHA-256: d9f7580e798d0bad559fe3b44b378edd82910945ee1d89aba10133d6870a7b23
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm hosted on disposable domains, with numerous external links, suggesting an attempt to redirect users to malicious content. The presence of a 'download' button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=drastic+ds+emulator+apk+free+download+full+version PDF link annotation
    • https://cdn.sqhk.co/rewazexi/hcvibjj/tubal_ligation_recovery_blog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5fd2edc822957.pdfIn PDF document text
    • https://cdn.sqhk.co/tubefajuvolu/dTQR1O1/fantasy_x-_dash_run_fantasy_space_jumper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449774/normal_5ff23f0e07e31.pdfIn PDF document text
    • https://cdn.sqhk.co/degixodip/Q3ihbgt/sonic_the_hedgehog_games_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/dCUHhfq/karta_gps_offline_navigation_apk.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/debovatajirof.pdfIn PDF document text
    • https://rujuzodojavumip.weebly.com/uploads/1/3/4/7/134726220/navikuzotipig.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/AhdXiir/food_giant_hueytown_hours.pdfIn PDF document text
    • https://pasadotofeb.weebly.com/uploads/1/3/1/4/131482919/tasawitudavij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463554/normal_604e89074ca49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502906/normal_6033801c12ff2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_8797c0c4665e4709928309d576c85dae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8bca3d-a6df-453d-b741-e6ba2e776a13/what_is_brayton_cycle.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_ed2ecdfbc6e9489cae5b823f7e40d184.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f620458d-12b7-45a1-ab3b-3fd8058f1e43/kitchenaid_superba_oven_microwave_combo_troubleshooting.pdfIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_b931851d4a4146ee9403907d62c02426.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83394cc9-ec55-498e-a540-82c943fce5ac/26620942085.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_eff3c5fc6bbd4075be5e9c94ae2e5a3c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b491659e-a3b0-41e0-ab89-d20d5d041d24/burris_eliminator_3_ballistic_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a45221-6a75-4bca-ae51-c1c7230c8de9/what_does_805_stand_for.pdfIn PDF document text
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_b9aee8f252b44caa99bd0bcb08d699a9.pdf?index=trueIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_c477e8b2597241c0ad6236f9eb54a2c7.pdf?index=trueIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_6459a18657994ead9b24cc473c315f4d.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_off000103ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 5516 bytes
SHA-256: 38ee592eb9f94a6b366f1ea266f2d436996a72a94854eea0efb37106dc233fcd
font_01_sfnt_off000116b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B3 12216 bytes
SHA-256: 6ddb4052b34b8d247e2f3b20cd223a864d713537e3e9e6160ff24157d71f5b69