Malicious PDF — malware analysis report

Static analysis result for SHA-256 8429946ba8d1529a…

MALICIOUS

PDF

72.4 KB Created: 2021-03-15 22:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d62ac529093fee818b6a77def644ebf2 SHA-1: 74d23d53964ef463107fbb9ddf241bae230483b8 SHA-256: 8429946ba8d1529a7eda01c9db9402f43f0a5378d84adaa41cb9dabf9ea3c58a
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a phishing lure, using a popular book title to attract victims. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a malicious link farm strategy. No scripts were extracted from this sample, but the overall structure and URL usage point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/strik?utm_term=harry+potter+y+el+caliz+de+fuego+libro+ilustrado PDF link annotation
    • http://gakagebir.mypressonline.com/6010122785.pdfIn PDF document text
    • http://jotewelife.iblogger.org/94075604461.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/bending_moment.pdfIn PDF document text
    • http://wetiludivarag.scienceontheweb.net/xoxamilam.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/30321462429.pdfIn PDF document text
    • http://larijasetejupaz.mypressonline.com/tugawoleva.pdfIn PDF document text
    • http://midimox.getenjoyment.net/cateter_umbilical_cuidados_de_enfermeria.pdfIn PDF document text
    • http://rotawafuwuno.scienceontheweb.net/xaxafutuxujabikexugolidow.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/why_are_short_sentences_used_in_writing.pdfIn PDF document text
    • http://suwefazimim.medianewsonline.com/speech_therapy_for_adults.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/nolog.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/wenobagupexekap/28239396789.pdfIn PDF document text
    • http://zokaramizixa.atwebpages.com/hallelujah_chorus_staff.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad937daf-dd2a-42e3-a407-825e3ad756a3/what_are_good_personal_development_goals.pdfIn PDF document text
    • http://novogizeboje.myartsonline.com/dawugawudogo.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/88250837524.pdfIn PDF document text
    • http://zokazeza.rf.gd/liftarens_guide_till_galaxen_stream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b18444b-6e1f-4b2a-a9d3-742081dd035b/graco_nautilus_65_lx_3-in-1_booster_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223f385f-3997-44c2-86e7-248dccff1c85/what_does_the_gospel_of_mary_say.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354d1d80-58b5-4700-a29c-3bc1b1f45465/how_much_does_a_dachshund_dog_cost.pdfIn PDF document text
    • http://xugonowelimije.epizy.com/alloy_718_data_sheet.pdfIn PDF document text
    • http://zimopup.myartsonline.com/wutokerupozamikudipotokuz.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/what_is_the_theme_of_the_landlady_commonlit_answers.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_off0000da02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA02 5576 bytes
SHA-256: 817238bdbf580cfc37793147e35a8e51c9b231208e8a1bc7ce0a882cbf471c70
font_01_sfnt_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 11060 bytes
SHA-256: a95cb41ba276e007d6ef0aba50133e7fc29d1f7c3ac563e0ff9dc48d6b201c91

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