Malicious PDF — malware analysis report

Static analysis result for SHA-256 982beea1f1380736…

MALICIOUS

PDF

77.5 KB Created: 2021-03-15 23:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 56c4eb201217b107d44ec1142e74362d SHA-1: 1115d9b0e6e98578e832da467c136ebbd7eee0a2 SHA-256: 982beea1f1380736b6ede6a5e1062089cf83469a7e6f481a7bc6f96dd7842774
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing and malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score suggest this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/award?keyword=total+knee+arthroplasty+rehabilitation+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443804/normal_60382213324b9.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/2dbtRgj/80101934514.pdfIn PDF document text
    • http://trenketo.buzz/37409329545o1yer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369920/normal_5ff616c9dd3d7.pdfIn PDF document text
    • http://ruvujagefeko.mygamesonline.org/33040502597.pdfIn PDF document text
    • http://websecurer.tech/how_do_you_repair_a_frigidaire_ice_makera5ejh.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/AhgZggw/wheel_on_the_bus_nursery_rhymes.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/6jiKjbn/puvusimij.pdfIn PDF document text
    • https://mopawikivitofa.weebly.com/uploads/1/3/4/3/134347346/soripujuruzof.pdfIn PDF document text
    • https://fesinukovib.weebly.com/uploads/1/3/4/7/134715349/gadewerel.pdfIn PDF document text
    • http://dompodklyuch.com/10363826992u0b8b.pdfIn PDF document text
    • http://korefubelexusiz.medianewsonline.com/calculus_1_2_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_6020744fc5a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_6011c9e36c35d.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/xolanifebinifariremif.pdfIn PDF document text
    • http://eurozone.pro/driving_zone_russia_mod_apk_download1nn11.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/vyUiagj/ghost_sound_message_ringtone_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_5fe7bc3f641f9.pdfIn PDF document text
    • http://gufutaca3.xyz/whirlpool_duet_steam_dryer_wont_turn_onk0bq4.pdfIn PDF document text
    • http://wulutano.mywebcommunity.org/jijaruxagovowojunuxeziz.pdfIn PDF document text
    • http://drive4mclaneaustell.com/mafigesodubosonemesesiwlijg8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://saluwagasa.onlinewebshop.net/weider_pro_4950_weight_chart.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_off0000e61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61B 5172 bytes
SHA-256: af83166c8a639ed7193a65e3fde55ed5eca44d157ee6487e43aa9ffd288145bb
font_01_sfnt_off0000f79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79C 10212 bytes
SHA-256: db1a0e3f3827f941228924a92cb2b5233c6f0a5f01c232d8886d3195baaf21d5
font_02_sfnt_off00011a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A95 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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