Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b3b088a3a691e8…

MALICIOUS

PDF

65.4 KB Created: 2021-02-21 22:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9444afa4690942fd2c72cfbe0a094590 SHA-1: dbc78b8ddbede297b8b7dffd63ea4fc3945438d8 SHA-256: a7b3b088a3a691e8653ff50d4bf08c699d9347ee85393a06737bf1e78bba2fd6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=amc+theater+bismarck+nd+showtimes In PDF document text
    • http://gramnews.xyz/zareba_200_mile_fence_charger_not_workingztn4w.pdfIn PDF document text
    • http://itactical.xyz/nimbus_note_useful_notepad_and_organizerse18bm.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/cAYcoZY/vasaju.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/jjbjczq/start_em_sit_em_nfl_te.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_6019bc928fe5c.pdfIn PDF document text
    • http://tlgfree.xyz/azimuthal_quantum_numberopoc1.pdfIn PDF document text
    • http://cocobeautybar.ca/sneaker_wallpaper_iphone_1151x09.pdfIn PDF document text
    • http://copyright-services-us.com/winominotesksdm7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5fd2ee063a097.pdfIn PDF document text
    • http://nickned.me/datadog_dashboard_list0zkyb.pdfIn PDF document text
    • http://graatorama.space/xalegexumuwapdc7i.pdfIn PDF document text
    • http://optalpha.com/lezituxavifokalira80kkm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504870/normal_5fe63cdbe414b.pdfIn PDF document text
    • http://wonnaturila.space/doom_eternal_doot_skingv8j4.pdfIn PDF document text
    • http://vorecan.fun/82448945410tilox.pdfIn PDF document text
    • http://lnstagram-badge-verification.com/murunaxokugelelobodotar4f22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lakadutof/kaththi_coin_fight_theme_music.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/carbonate_reservoirs.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_off0000c287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC287 5432 bytes
SHA-256: f06628ca21a966713dc548f31d0abb96a33328bd52c55d935b650bef44709728
font_01_sfnt_off0000d4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E0 10312 bytes
SHA-256: bdb831d45fdae1b6b5980b70a0d209355fc1ceb170e9567bcda8b8a28f191c12