Malicious PDF — malware analysis report

Static analysis result for SHA-256 804fa2d46a956071…

MALICIOUS

PDF

72.5 KB Created: 2021-03-24 08:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 7eb5e04b3be60dd792f877f2ecd7a090 SHA-1: 9e32e40b1a497c387940eb896b8024766a0da571 SHA-256: 804fa2d46a9560719c9bbd2ce1a34058c8d316aa255ecd05da402b4671e8494e
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically targeting a search query for a 'fisher paykel dryer service manual'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/wix?keyword=fisher+paykel+dryer+service+manual PDF link annotation
    • http://servisvds.ru/rawozapoxexulexakuvuzu6j45q.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/tofezurut.pdfIn PDF document text
    • https://dimitosakusefix.weebly.com/uploads/1/3/4/6/134631941/jeriguba.pdfIn PDF document text
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/netozuwitivovuwij.pdfIn PDF document text
    • http://allerlo.xyz/viludidupitutuxutilomadv8f0.pdfIn PDF document text
    • http://kufukoxeb.22web.org/alternative_dispute_resolution_mechanisms_in_nigeria.pdfIn PDF document text
    • http://guvinesusavilo.iblogger.org/heart_of_darkness_documentary_online.pdfIn PDF document text
    • http://stickerrus.ru/915396035737futq.pdfIn PDF document text
    • http://leomannapov.com/staircase_structural_analysis_and_designfva96.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/fovetosexuza.pdfIn PDF document text
    • http://mebelrostov.ru/90297442034u1o4l.pdfIn PDF document text
    • http://suzuxef.22web.org/way_back_into_love_piano_chords.pdfIn PDF document text
    • http://mebosopevux.iblogger.org/powerpoint_presentation_templates_medicine.pdfIn PDF document text
    • http://sodahq.pro/35397681927v7cwa.pdfIn PDF document text
    • https://wibixebaroz.weebly.com/uploads/1/3/1/8/131856543/417000.pdfIn PDF document text
    • http://tapovapusewirol.iblogger.org/para_qu_sirve_la_vitamina_e_de_nutrilite.pdfIn PDF document text
    • https://www.betta.com.au/kitchen-In 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://nawexox.epizy.com/emirates_id_online_application_form.pdfIn PDF document text
    • http://gisaxuzarufol.epizy.com/16740513409.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/57347718560.pdfIn PDF document text
    • http://wabalan.epizy.com/tumigisomilegiwujakev.pdfIn PDF document text
    • http://lewiwosu.epizy.com/55106514729.pdfIn PDF document text
    • http://xijejuvi.myartsonline.com/how_to_reset_my_electric_hot_water_heater.pdfIn PDF document text
    • http://tikisomoxo.epizy.com/ginotud.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_off0000d2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B5 5184 bytes
SHA-256: eecff75fb5e92716c2cf1709cbc2ee89d5cbd73fddd8d8c598c30944e8b69f24
font_01_sfnt_off0000e42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42C 10032 bytes
SHA-256: 4f2de1cf34f0d3613a27cfa08c40adc0db98a2f7f0900e7d5fc5a30cd84ff9b1
font_02_sfnt_off00010627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10627 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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