Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f671ebc3b1ba48b…

MALICIOUS

PDF

72.5 KB Created: 2021-02-26 02:25:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8e272265476213953403ad9becd2439e SHA-1: 432210c813e9dc64942131a881a63289dffba7d4 SHA-256: 0f671ebc3b1ba48bd134d8914f2f68dc46a24711c6be7d16ff3c7359977d2011
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/award?keyword=how+to+study+for+ochem+2 In PDF document text
    • http://zugemenelil.medianewsonline.com/rukedabusap.pdfIn PDF document text
    • http://adv-workshop.site/sons_and_lovers_theme_analysisdgmnd.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/how_to_install_self_adhesive_vinyl_wallpaper.pdfIn PDF document text
    • https://nafuvazufu.weebly.com/uploads/1/3/1/4/131407552/rukebonew.pdfIn PDF document text
    • http://epipog.com/416869198637a4q.pdfIn PDF document text
    • http://hydrofthol.space/nomaxuwudelanmjkp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476783/normal_602551231e73b.pdfIn PDF document text
    • http://subfamjtii.site/how_to_know_if_a_shy_man_is_interested_in_youlx5n1.pdfIn PDF document text
    • http://hotita.fun/jabomorewodadn85q.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/35388827643.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/teneso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375087/normal_6008a13ae521f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421341/normal_60016baf0b9da.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/haier_portable_air_conditioner_replacement_hose.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/lotudizudol.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/brave_new_world_revisited_aldous_huxley.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/ghgdkgf/project_drift_apk_download.pdfIn PDF document text
    • https://kukuwusak.weebly.com/uploads/1/3/1/3/131379738/bofumo-migubetanurog-rogutitexa-fuxonekabisaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF20 5308 bytes
SHA-256: 8f2167aa3cb0690f07efa61f030f535fcc12684fd96266ffc2f692b4d62a1706
font_01_sfnt_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 10564 bytes
SHA-256: 1c5a9a49e5e9ba06a4fb9c06f6ee4ab167c4f2513ba19534c677c03b133de090