Malicious PDF — malware analysis report

Static analysis result for SHA-256 8846ab3340811132…

MALICIOUS

PDF

74.6 KB Created: 2021-02-12 22:24:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 23c883925098db5ee1779ed5fde6977a SHA-1: d3f0551470ba782ec02d8d6e72762e28f6f80d39 SHA-256: 8846ab33408111323f63584eb4982b57eb5ebb38530f82ec05d118bf96b53909
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. No scripts were extracted, but the presence of multiple external URIs suggests an attempt to lead the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/123?utm_term=kenmore+mini+ultra+sewing+machine+needle+size PDF link annotation
    • http://xajoraxi.22web.org/avg_antivirus_pro_cracked_apk_2018.pdfIn PDF document text
    • http://dabuvede.66ghz.com/pifelixatijagejo.pdfIn PDF document text
    • https://febujularezot.weebly.com/uploads/1/3/0/8/130813651/firagidebudal_bofazutabu_tixowapo.pdfIn PDF document text
    • http://mamontov-net.cc/nome_dos_androides_de_dragon_ball_zm0alv.pdfIn PDF document text
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/7335432.pdfIn PDF document text
    • http://fanogizakelime.iblogger.org/wizard101_norse_mythology_trivia_answers.pdfIn PDF document text
    • http://instapodarok.site/ballpoint_pen_art_for_beginners2td4h.pdfIn PDF document text
    • https://jedegifopa.weebly.com/uploads/1/3/0/7/130738854/mijizubezux_xikibinisikaxit_midolewug_pujogozoz.pdfIn PDF document text
    • https://zulevoto.weebly.com/uploads/1/3/2/6/132696122/xevuzemix.pdfIn PDF document text
    • https://gabinomila.weebly.com/uploads/1/3/4/7/134763369/3f766b339.pdfIn PDF document text
    • http://duxuzibeb.22web.org/google_dorking_cheat_sheet.pdfIn PDF document text
    • http://osmosiotzs.fun/19565403720mhyx7.pdfIn PDF document text
    • http://ludshop.xyz/mineral_wells_fossil_park_mineral_wells_txr1apr.pdfIn PDF document text
    • http://widuzuduzudovix.iblogger.org/slay_the_spire_ironclad_guide_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://voderekop.rf.gd/consumer_reports_best_rated_suv_tires.pdfIn PDF document text
    • http://besikinugid.epizy.com/mera_bhola_hai_bhandari_song_gaana.pdfIn PDF document text
    • http://pejulok.epizy.com/brussels_airport_departures_information.pdfIn PDF document text
    • http://fitimulosegi.epizy.com/keminerobodugezuda.pdfIn PDF document text
    • http://marabawem.rf.gd/metformin_er_500_mg_efectos_secundarios.pdfIn PDF document text
    • http://zavivemigowoson.epizy.com/mifebufifupijos.pdfIn PDF document text
    • http://zorogeloma.epizy.com/24176513566.pdfIn PDF document text
    • http://woxozizelisudu.epizy.com/vaxedibatagujekom.pdfIn PDF document text
    • http://surifuj.rf.gd/20124423781.pdfIn PDF document text
    • http://kudurefusi.epizy.com/top_thrilling_games_for_android.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_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 5464 bytes
SHA-256: 9965ef638156775d233561c6d8f80bf83456828fae88752ba3173bf03708cc49
font_01_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 11060 bytes
SHA-256: 7a6215edfe76d59a09e6023ae948b0e96a5a41c172a0c06fd48ebae6f356484f

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