Malicious PDF — malware analysis report

Static analysis result for SHA-256 4204f335b50d69cc…

MALICIOUS

PDF

65.1 KB Created: 2021-03-02 15:03:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 817b54374064d2aab9a1d00179a1f239 SHA-1: b74990985d66b4d0d87a531e6d15f15b59714dd2 SHA-256: 4204f335b50d69cc435113437b8d7c73034fca7282bf1d8617fb314fbd7f59fb
194 Risk Score

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/wix?keyword=flow+free+answers+extreme+pack+12x12+level+16 PDF link annotation
    • https://pobubejafak.weebly.com/uploads/1/3/5/3/135314602/rijofafanu.pdfIn PDF document text
    • https://mikotefi.weebly.com/uploads/1/3/2/6/132695671/pubas-jutonak-dififakabipes-wijokanov.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/migitipojosemunu.pdfIn PDF document text
    • http://skywonder.space/acknowledgement_for_narrative_report_immersion7x3qf.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/2469719503.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/jehhKgf/the_last_man_to_stand_lyrics.pdfIn PDF document text
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/botujuwubiruvil_bevusotuvox_gemew_zujajuzotizu.pdfIn PDF document text
    • http://apsdd54gfv.xyz/coolrom_gba_romso4o5m.pdfIn PDF document text
    • http://italia-doc.fun/livable_house_design_guidelines16yzv.pdfIn PDF document text
    • https://digeforoxega.weebly.com/uploads/1/3/4/6/134668277/0e460.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/4466655.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/dogebamesapu_vasasugikiref_wobovurebegi_jurikuxapep.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/DSFtSgi/10976526979.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/lasuwakedexevofogasu.pdfIn PDF document text
    • http://mavpa.fun/77892928715uoek9.pdfIn PDF document text
    • https://nibasekugi.weebly.com/uploads/1/3/1/0/131070633/nozurozifateset_jufovika_bawipiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bivojeda.atwebpages.com/how_to_check_login_on_facebook.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_off0000c262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC262 5736 bytes
SHA-256: afaa5beaf7886ec6a30210ac390128407f7024bd437730752439cefc8cb75ee5
font_01_sfnt_off0000d5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FB 9788 bytes
SHA-256: 13f174c4e9b07ddbfd44de1597abad180a8abcb66b96e58b0fdb5d04ac4ca79b

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