Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8a86226fc0a226…

MALICIOUS

PDF

80.2 KB Created: 2021-02-13 15:33:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 677c5a3bd811c9419a7aad52c626b6bf SHA-1: fb4eadf2dee8888ae974f1847be29167154f5786 SHA-256: 9c8a86226fc0a226fc65d30f307c98c4d0d2920718607d3b2050aa0467321969
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://seumenha.ru/123?utm_term=literary+elements+in+hamlet+act+2 PDF link annotation
    • http://ihsteam.ru/livro_fio_vermelho_do_destino_do14tjq.pdfIn PDF document text
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/8f7327.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/wubulimumefebe_lawanudabu_wipezarimepom_vupifixedeto.pdfIn macro / runtime command snippet
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/migikitoxoxunot.pdfIn PDF document text
    • https://wimegipovuxu.weebly.com/uploads/1/3/4/3/134373819/bigik.pdfIn PDF document text
    • https://dananiruw.weebly.com/uploads/1/3/2/7/132741593/3dda14364.pdfIn PDF document text
    • http://bachanalytics.com/boxapobevalofuze3b5oa.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/33466126646cb7px.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://difadedox.rf.gd/27915922605.pdfIn PDF document text
    • http://gusubozavagu.epizy.com/android_adb_location_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/google_drive_link_wget.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/office_manager_resume_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/stickers_for_telegram_android.pdfIn PDF document text
    • http://remibuvemofe.epizy.com/tatinobalepew.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/little_brother_chittlin_circuit_1._5.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
    • https://s3.amazonaws.com/vovabagubajegeb/office_manIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE06 5212 bytes
SHA-256: e00238ee4b67ce11ca604592459a0d49ee7489debd3a5f2515897cd797a96123
font_01_sfnt_off00010f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9D 10620 bytes
SHA-256: d1e65e630880c3736a23c086a8dd68d2753c398341bcb6e1eb4ee8ea084ac102

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