Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bb75985e3cbfb6…

MALICIOUS

PDF

72.2 KB Created: 2021-02-18 14:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0c0b979e65f84914d7d058b71560ddd3 SHA-1: f7a009fbaef7fd16c96f608ad1249c9a601fed7a SHA-256: 64bb75985e3cbfb632c9f387f1f22df0d26ea066d183ae7015e3b054428e52b9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The 'SE_INVOICE_LURE' heuristic indicates the document's content is likely a deceptive lure, such as a fake invoice, to encourage users to click the embedded links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jacksth.ru/strik?utm_term=what+is+introduction+to+business+law PDF link annotation
    • http://0fruit.space/618567462465koq9.pdfIn PDF document text
    • http://ezfix.asia/wisiforeecvhr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_60230dc9e8c68.pdfIn PDF document text
    • https://cdn.sqhk.co/bejazerorod/xcgfFji/canon_i_runner_2530i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_5fd76b94216a2.pdfIn PDF document text
    • http://busibear.com/13244862683wylks.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/UhfPdij/63754543409.pdfIn PDF document text
    • https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/lidetenom-wawew-wilol-fewupogenela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_601f9ab057629.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/hcTegiV/pressure_washer_replacement_pump_horizontal_shaft.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/ARbcih1/football_manager_2020_covid_19.pdfIn PDF document text
    • http://macsk.space/xajufukutijujuguztg5w8.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/kukevezolujepawi.pdfIn PDF document text
    • http://tesar-krd.ru/jailbreak_in_app_purchase_tweakgn8pn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF10 5272 bytes
SHA-256: 04c40f312ae61998a8fe4b99543dcbdbc48100f3e5d41dd10764cced54496da5
font_01_sfnt_off0000f106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF106 10160 bytes
SHA-256: cc7937d9afc55b0fe03fddd67c38c8171a69f0e3d573224dd1a6e5accfbbe02b

Open this report in the interactive analyzer, or submit your own file for analysis.