Malicious PDF — malware analysis report

Static analysis result for SHA-256 06231aecca02f3b5…

MALICIOUS

PDF

96.4 KB Created: 2021-05-05 01:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 78b277b629fc86ac61184eb300162654 SHA-1: 239178bb4f06e2675cd51866ba45ce23a606c9dc SHA-256: 06231aecca02f3b569cbbca0bb5e576a17a06f57ab565ac4d4589601371fde32
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing attempt. The presence of 'utm_term' in one of the URLs further supports the idea of a targeted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • 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 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://midufefew.ru/strik?utm_term=liftmaster+la500ul+installation+manual PDF link annotation
    • http://meetsucre.pro/duxutaxeluwexibaw9ok7t.pdfIn PDF document text
    • http://nurigoluda.mygamesonline.org/cash_basis_vs_accrual_basis_example.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/sazaku.pdfIn PDF document text
    • http://cabinetsop.xyz/where_to_watch_scrooge_1951fuhjq.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/xoujhXy/veito_blade_heater_replacement_bulb.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/dSgefis/swift_current_soccer_office.pdfIn PDF document text
    • http://pigemugugobur.mygamesonline.org/mopirab.pdfIn PDF document text
    • http://50offstore.pro/le_verbe_aller_au_prsent_exercicesh9a5i.pdfIn PDF document text
    • http://copyrightshelpcenter.com/vasadezigojerulemokuwa4v.pdfIn PDF document text
    • http://netlysy.online/9492311210j4151.pdfIn PDF document text
    • https://mefuwowenapes.weebly.com/uploads/1/3/4/6/134611128/b8329e00603715.pdfIn PDF document text
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/makolotudafi.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/bavafuvaxajus.pdfIn PDF document text
    • https://mabajiluvepe.weebly.com/uploads/1/3/1/4/131409333/zedutovutenezamuto.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/Bjfghpn/grass_edge_cutter_home_depot.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/xekidowi-fegodutumudil.pdfIn PDF document text
    • https://kenojulovananav.weebly.com/uploads/1/3/4/0/134016885/69ba2.pdfIn PDF document text
    • https://cdn.sqhk.co/neganobasiwe/fgeicjc/gujukexexotib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/026a06ae-d1a6-4bb9-9131-139b01585e82/m-audio_axiom_49_driver_mac_os_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26feae4-7827-466c-a1fd-e3fda8f17915/kotumegi.pdfIn PDF document text
    • https://6dca1d0c-b102-4aa4-a312-d013f97c39dd.filesusr.com/ugd/fb87fb_2975b68ce7644d7abbd0bcacb9330690.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ec7238-0405-4904-9152-c2080543426c/bamifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c34ec1-8a17-490a-ab05-806c477da521/motorola_bluetooth_keyboard_pairing_mode.pdfIn PDF document text
    • https://19d8af67-ac20-4a7c-8ffd-69be953788a8.filesusr.com/ugd/578741_c795260e66bb4de7999013bae8154062.pdf?index=trueIn PDF document text
    • http://wokidomogu.onlinewebshop.net/4620608901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d04b207-772c-43b3-b395-ee09c476e2a5/dusopolofewikaden.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_off0001378a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378A 5120 bytes
SHA-256: 8b17a9dbbef66ae4f61e9ceb28c61a5f700d713567a33af2efbe8c9ae2bb2645
font_01_sfnt_off000148e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E4 12864 bytes
SHA-256: 247dccef7a1d86d796c15a24e398337d8d4617884ef6ffe81b2569d04fb886e2