Malicious PDF — malware analysis report

Static analysis result for SHA-256 024708cf8aab3116…

MALICIOUS

PDF

78.6 KB Created: 2021-03-24 08:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ee6180a90bc73886430a4a71b4f4a8f9 SHA-1: 9470a90b75e8e5604f8195a4121c93f213cc88a1 SHA-256: 024708cf8aab31166a5855af37bd6ae7035d57125fd8bc36886bf1dfe001668d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/award?keyword=the+artist+way+julia+cameron+pdf PDF link annotation
    • http://mjawebdesign.net/antifa_book6ehwl.pdfIn PDF document text
    • http://vegogik.iblogger.org/67586794237.pdfIn PDF document text
    • http://goodnaturak.space/jidozow6uvl6.pdfIn PDF document text
    • http://avtoshtorki.shop/dekaxutanivo3zpdq.pdfIn PDF document text
    • http://leafester.online/koteti7fw80.pdfIn PDF document text
    • http://temppicture.xyz/smartthings_hub_v4u2f4d.pdfIn PDF document text
    • http://pixell.store/48486578044tlqh2.pdfIn PDF document text
    • http://sejapamuji.22web.org/join_files_foxit_reader.pdfIn PDF document text
    • http://antonio-ita.space/91825819656ipheb.pdfIn PDF document text
    • http://myluckybet.xyz/bevilorekenulusu4sevs.pdfIn PDF document text
    • http://soldonlakewood.com/gevuniwamuxuvafa4iyn7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiwigazuvix.rf.gd/acute_kidney_injury_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/whatsapp_status_video_tamil_for_husband.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/melifogonofetegopo.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/gozoredunufobopejaz.pdfIn PDF document text
    • http://nafakosoleg.epizy.com/nyssma_manual_piano.pdfIn PDF document text
    • http://tilufisarulisa.rf.gd/dekidazidagezewikeje.pdfIn PDF document text
    • http://vuremekewema.rf.gd/46579318823.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_off0000f057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF057 5612 bytes
SHA-256: c9448658578d460a3d6efc004212bf81f596025e6c9df5329e5119cb86cc2251
font_01_sfnt_off00010360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10360 15488 bytes
SHA-256: ec103b5cf5f4da78e6bac4b647fc4e8f3a3a3af5f4020dc96fd7af00d9a519f4

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