Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a45ca089a46cac…

MALICIOUS

PDF

174.6 KB Created: 2021-03-23 19:35:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3247ce89c5619a5215d9cd02411aa350 SHA-1: 80ab3a219299a7ff518a0a87f62078fb75b43218 SHA-256: d2a45ca089a46cac43c2d22dff702e6f82e5abc851584c056ad2cb69153d9634
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to 'gimoguvi.ru'. Heuristics indicate this PDF is a link farm on disposable hosting, likely intended to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://gimoguvi.ru/strik?utm_term=4+ezra+online PDF link annotation
    • http://bufenukaje.22web.org/how_to_adjust_kitchenaid_artisan_mixer.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/buvubojadelesi.pdfIn PDF document text
    • http://toredakaf.22web.org/bejipipatinugetemujosulij.pdfIn PDF document text
    • http://zuvomeronimewa.iblogger.org/fimiwuliz.pdfIn PDF document text
    • http://wotuxolis.iblogger.org/sony_str-k840p_manual.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/formato_de_solicitud_de_empleo_para_imprimir_gratis.pdfIn PDF document text
    • http://nunopasatipimav.medianewsonline.com/16582364150.pdfIn PDF document text
    • http://kulofokugizadeb.22web.org/66203910795.pdfIn PDF document text
    • http://zipogagu.iblogger.org/pafafojuvad.pdfIn PDF document text
    • http://lefijuf.iblogger.org/wufibukufir.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
    • https://uploads.strikinglycdn.com/files/ec0270a1-2e10-4c49-a10b-ae5bf021611f/31148571508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9d27ee-a679-4dc7-8eb7-660797eb7c97/24687612060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bffca1f6-36e8-435b-9b68-bb8674e2986d/76117686353.pdfIn PDF document text
    • http://tosebimujuted.epizy.com/reforuvikibakuzufufuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd16e06a-41ce-4e20-aa09-cb2a1ea24000/32074342576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9550fe6-1522-41a2-827d-bb0bd4ca29d8/how_to_score_locus_of_control_scale.pdfIn PDF document text
    • http://suferipuwa.epizy.com/33184679231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a640ecf7-3496-4e5f-a010-2822ff03080d/walmart_hours_of_operation_christmas_eve_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675b1deb-3259-4ae6-b60b-4b76cb6c9e4a/does_danny_survive_in_the_shining.pdfIn PDF document text
    • http://ditiruvovuluka.epizy.com/anemia_clasificacion_oms.pdfIn PDF document text
    • http://kuzojif.rf.gd/belgium_pro_league_form_table.pdfIn PDF document text
    • http://waxivetik.epizy.com/kokabavowejubuxujudelo.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_off00026c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26C4F 4252 bytes
SHA-256: a4515be7e699cd2fab924f466700800f75dde51bdab0ce17009a95385afb0958
font_01_sfnt_off00027ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27AB8 10472 bytes
SHA-256: 3e34f511141c9d83bb256e41b6b0a2b01d66d37c7c076788ada1d55853a74499
font_02_sfnt_off00029e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29E96 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176