Malicious PDF — malware analysis report

Static analysis result for SHA-256 a140175199fde85f…

MALICIOUS

PDF

75.6 KB Created: 2021-03-14 16:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 644a7456cc202fa74c8c55ae878f8963 SHA-1: 0e5a2efcafb50720db6d7a156681220dec0771b5 SHA-256: a140175199fde85f6b6b9283253c722c2fa8aa665e0f3a523dce82e4551dbaaf
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document is designed to host many links on disposable hosting, likely to redirect users to malicious sites.

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://botokaw.ru/strik?utm_term=how+much+would+it+cost+to+replace+a+catalytic+converter PDF link annotation
    • http://zokiwedilar.mypressonline.com/69646618457.pdfIn PDF document text
    • http://tesar-krd.ru/greek_mythology_gods_and_goddesses_names_liste4jxt.pdfIn PDF document text
    • http://ostanni.fun/25607760764ro7bt.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/nabijerokuwutakulupoganob.pdfIn PDF document text
    • http://cashbackk.site/marche_en_bton_prfabriqu_leroy_merlins9vln.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500444/normal_5fc8bf4ccac10.pdfIn PDF document text
    • http://ouily.xyz/twilight_breaking_dawn_part_2_soundtrack_download_zip6p352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426941/normal_601b898a8d14b.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/qDhjifd/lanazalurufigegobow.pdfIn PDF document text
    • http://dusikazo.mypressonline.com/cello_sheet_music_free.pdfIn PDF document text
    • http://save50it.info/56101992521fx7pq.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/jF8Gchd/business_analyst_process_mapping_jobs.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/peavey_bandit_112_blue_stripeqvaj9.pdfIn PDF document text
    • http://coupons2020.info/gedawuferufuznshxe.pdfIn PDF document text
    • http://rosativiwam.mypressonline.com/9117629726.pdfIn PDF document text
    • http://stassikorskyi.com/garozadibefoamgmt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_603f748772eb1.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/gijjge6/civilization_3_expansiones.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/xubutazalisozub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896322be-6f86-43e4-b197-a30fe5be7b64/bijuxefek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84978922-d811-4b9c-b0d0-327d074ab6be/sanoduwuniwulavuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab5260f-c376-4f22-abc8-f28ca446eae9/htc_m8_price_in_nigeria_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/436f4960-dae0-4f7a-a168-2e74bee5f08a/best_fishing_lures_for_bass_in_summer.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_off0000e9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EB 5528 bytes
SHA-256: 0d9771cb7a137c615589b6404c369fb9d3fab392e9333c00ffb65f36656a1446
font_01_sfnt_off0000fca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA7 10492 bytes
SHA-256: c770dc54a1231288ba45c6cb904f386c7c22cc4b9c4fe9de37588e45cc67b9b0

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