Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd85146d4a56d1e…

MALICIOUS

PDF

79.1 KB Created: 2021-06-02 12:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3fdb821a7bba93bdaeea108e4dcdead3 SHA-1: 1618ecd0e31709276cdf507afeebd88f616e1d78 SHA-256: edd85146d4a56d1e8f108cbe63ab977d2ed1995548e753da99e0f395cc86186f
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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
  • 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://pelibifir.ru/123?utm_term=donor+pledge+card+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474734/normal_6045e5fd19023.pdfIn PDF document text
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/6452215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_604136aa855a2.pdfIn PDF document text
    • https://xikiwideb.weebly.com/uploads/1/3/4/7/134730665/zogiz-nipikijop-mijorilina-debefozepesi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87f2227-925a-474b-85ec-64635e2e00ed/wesefitapujajaluwojamek.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144496956/cartoon_wars_3_hack_apk_2_0_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74230f82-5025-43cd-84c2-a87261c12602/beowulf_and_sir_gawain_comparison_essay.pdfIn PDF document text
    • http://midevodimu.pbworks.com/w/file/fetch/144435129/40718126448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd76f542-560b-4ad4-b2f5-a693d6b7c776/jesus_calling_sarah_young_large_print.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/what_is_the_difference_between_awg_and_mm2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a90210b-16b8-4d20-860f-05f10436de4e/bible_study_on_matthew_11_28-30.pdfIn PDF document text
    • http://sujagajo.pbworks.com/f/75594802268.pdfIn PDF document text
    • http://kolelulu.pbworks.com/w/file/fetch/144418050/10260955514.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/f/how_to_program_cox_remote_to_control_tv_volume.pdfIn PDF document text
    • http://zuvevetub.pbworks.com/w/file/fetch/144423285/tolegogamumizewajiwa.pdfIn PDF document text
    • http://zexowisam.pbworks.com/w/file/fetch/144426711/3_branches_of_government_4th_grade_lesson.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/w/file/fetch/144501933/biddeford_electric_blanket_washing_instructions.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/bilderberg_group_members.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef60ee40-3eaa-444f-a3bb-1a03449a99e0/paulo_freire_pedagogia_del_oprimido_resumen_capitulo_2.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/physics_for_scientists_and_engineers_6th_edition_tipler_solutions.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_off0000f77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77B 5216 bytes
SHA-256: d71d5c32b4c41a1ce622ffd7ae43a1ca612214b0ddbfd80f1be5b4768b3fe300
font_01_sfnt_off0001092a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092A 10584 bytes
SHA-256: b162522a0f2417479f9cdc7fe1f13a43cddcddfadbe7b2e7c3e38f92ec1e3b95