Malicious PDF — malware analysis report

Static analysis result for SHA-256 f711f4e78125be6f…

MALICIOUS

PDF

68.5 KB Created: 2021-02-03 17:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 87cc09e76a0178527ceef360ce825a1d SHA-1: b31aa74775782075cf9ce41477e9e59078cf80fb SHA-256: f711f4e78125be6f548643966bd120f46c2862a92239f5b8aca8d690df8768b1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=kindergarten%20worksheets%20science%20animals In PDF document text
    • http://pivojapigalotu.22web.org/96647072105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_600cebead4c11.pdfIn PDF document text
    • https://cdn.sqhk.co/tigafita/bheARhj/58048320229.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378405/normal_5fc9e46c35804.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454809/normal_5fca5b184801c.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/qhhDEnD/wakujanenetonivizewan.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/Mhbhf85/diy_electronic_projects_for_adults.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fc6ce6608a9a.pdfIn PDF document text
    • http://pedujagafena.22web.org/61319289106.pdfIn PDF document text
    • http://nemeloru.66ghz.com/vofowot.pdfIn PDF document text
    • http://zebolalifitu.22web.org/canon_canoscan_9000f_mark_ii_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://limufewugewo.rf.gd/octopus_box_driver.pdfIn PDF document text
    • http://bazogojuzularib.rf.gd/body_scanner_camera_apkpure.pdfIn PDF document text
    • http://novisagaxorom.epizy.com/bengali_movie_song_2019.pdfIn PDF document text
    • http://kuzebelinebofe.epizy.com/color_mania_answers.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_off0000cfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCC 5476 bytes
SHA-256: d62fcd1019914429e1e30cc6369677c5f90b0e80340cf68720f027ab2c891652
font_01_sfnt_off0000e258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE258 10276 bytes
SHA-256: c8135c0d5c8303712a6047b5c1449924661a89628aff3c2b723d9045a09d45db