Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0b0531e9a0eee8…

MALICIOUS

PDF

77.3 KB Created: 2021-04-02 02:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 96e2b5dc2449d0b13cd8771c0b0d20f3 SHA-1: c05a21bcd7d8c89a3b33ad56facc789b9d61054e SHA-256: ef0b0531e9a0eee870a5570535af55ca84382271532e6b2086eff512efcc77c5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, a common tactic for distributing malware or directing users to phishing sites. The embedded URLs suggest the document is designed to lure users to external resources, potentially for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://nipisod.ru/123?utm_term=disco+elysium+achievement+guide PDF link annotation
    • https://mibokedizigabu.weebly.com/uploads/1/3/1/4/131437832/8811631.pdfIn PDF document text
    • http://maxidadikegi.iblogger.org/raising_broiler_chickens.pdfIn PDF document text
    • http://dfds.in/hunger_games_book_1_ending_summaryyas6g.pdfIn PDF document text
    • https://zedabobosarafon.weebly.com/uploads/1/3/0/8/130813357/xidinusa.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/18f4a78.pdfIn PDF document text
    • https://xebuzoxovekig.weebly.com/uploads/1/3/4/0/134018553/1053864.pdfIn PDF document text
    • https://divaruwidis.weebly.com/uploads/1/3/4/0/134042650/baravafiwena.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/xusevidebu_galanamubeluba.pdfIn PDF document text
    • https://wixokaregojes.weebly.com/uploads/1/3/2/6/132681478/wejezifi_sijifepe_bovikepeva.pdfIn PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/paboxelofagejeda.pdfIn PDF document text
    • https://lowujowe.weebly.com/uploads/1/3/5/3/135320741/gijumagevo-mosuzupobos.pdfIn PDF document text
    • https://fekagisikazepi.weebly.com/uploads/1/3/4/6/134680816/e9f242.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/kefofujezununow-boneg.pdfIn PDF document text
    • https://mopotiwifatuge.weebly.com/uploads/1/3/0/8/130813373/nowazajitu.pdfIn PDF document text
    • http://gufutaca6.xyz/rilasozumec1ws1.pdfIn PDF document text
    • https://nofitipofawotuj.weebly.com/uploads/1/3/4/0/134012335/a78fa1ca46c9.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/9371526.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mavusovemoritev.rf.gd/98582473402.pdfIn PDF document text
    • http://dajurelelerasak.rf.gd/putaxumosupavaweliwa.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_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 5420 bytes
SHA-256: a1d273e86e9418dcc6e9d1d40dea5c332e59157a1b4bc9949fcdfb4cef8fd84c
font_01_sfnt_off00010219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 10592 bytes
SHA-256: 8c4e25c34414de77cb2d6081c7f26c64000309ad691cfef9532544ab456bdc95

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