Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a43448866848bb6…

MALICIOUS

PDF

74.9 KB Created: 2021-05-12 03:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 25acf403bc656ad7b4f3f7d1b62a4ff3 SHA-1: 29285d73ae7d4c2553e55c38b512e4d1603396bd SHA-256: 2a43448866848bb63ab2fbb3f419f8d87852499a67bac7698cdc9f72cdcc4053
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into visiting a compromised site or downloading a payload. No scripts were extracted, but the PDF structure and embedded URIs suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://jumiwimov.ru/strik?utm_term=how+to+refill+ink+cartridge+hp+678 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386366/normal_5fd860ce29284.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/cgeK6oA/nupezolovidavekolufe.pdfIn PDF document text
    • http://sovetnik53.ru/whats_the_best_waterpik_on_the_market175pw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410731/normal_5fd97da83121e.pdfIn PDF document text
    • https://cdn.sqhk.co/xivumatozo/Hiehfgh/hill_climb_racing_2_new_team_event.pdfIn PDF document text
    • http://mejuzuw.scienceontheweb.net/zukezoditelewem.pdfIn PDF document text
    • http://ranixug.iblogger.org/mazime.pdfIn PDF document text
    • http://nawoxafibajove.22web.org/69510927643.pdfIn PDF document text
    • http://palopej.sportsontheweb.net/linux_shell_script_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/kjdkQtO/18573267577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_6058161f18440.pdfIn PDF document text
    • http://net-klientov.ru/cruz_beckham_school_uniform289rj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_60659d554d164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_601835d1a8b96.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/hhjehjN/school_management_app_github.pdfIn PDF document text
    • http://winoorama.site/461539657700w2up.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lotapit.epizy.com/lobaxekefiraxefezemezomu.pdfIn PDF document text
    • http://foxorefo.epizy.com/avast_antivirus_2019_pro_apk.pdfIn PDF document text
    • http://xibusen.rf.gd/563986137.pdfIn PDF document text
    • http://bibijovefuvak.epizy.com/borderlands_2_dlc_commander_lilith.pdfIn PDF document text
    • http://zodejatoxore.rf.gd/augusto_dos_anjos_eu_e_outras_poesias.pdfIn PDF document text
    • http://jujewejono.epizy.com/vejibejop.pdfIn PDF document text
    • http://nozanela.epizy.com/1548303324.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_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 5784 bytes
SHA-256: 86ee11f45e6a68fc62610d3b7f7f4d354662391409cf680147e57d0c098f664a
font_01_sfnt_off0000fae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE0 10320 bytes
SHA-256: a168453a3e3a81743c680bdcd0042394030bbb24b1c323e00f1c41a23a5ce3da

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