Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb8af5290354785…

MALICIOUS

PDF

73.0 KB Created: 2021-03-03 06:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c286b283760b46a4527577f26f6577cf SHA-1: 365af5c07ca2a8c26f3c4a5a4d8ac9e418a7ea15 SHA-256: 3fb8af5290354785cc6bd7c303868b11c32cdbadacd5e46c1c9ec1ce248c81c6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://nipisod.ru/wix?keyword=z+for+zachariah+chapter+questions+and+answer PDF link annotation
    • https://cdn.sqhk.co/bepeguvovori/dqjhvji/zirovujapubolivakafelino.pdfIn PDF document text
    • https://cdn.sqhk.co/lafugafeniki/iwAhbwC/learn_html5_and_css3_from_scratch.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/pesolutekudipukop.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/bobuvasekamapigilama.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/2hfVhbR/3d_puzzle_model_football_stadium.pdfIn PDF document text
    • http://daddytestit.xyz/startup_business_financial_plan_template_excelact7e.pdfIn PDF document text
    • https://nefikeroliv.weebly.com/uploads/1/3/1/4/131453179/molobutekevale_dojaje_fanizapisevo.pdfIn PDF document text
    • http://misstourist.info/sikokisupoweloxazoz6ze89.pdfIn PDF document text
    • http://blockhcain.host/26245189234ducuu.pdfIn PDF document text
    • http://dressnbuy.com/kobaxuvojaduniwopanazesbrfl.pdfIn PDF document text
    • https://cdn.sqhk.co/gaximeme/Mjal6VS/17302736409.pdfIn PDF document text
    • https://kadimonadi.weebly.com/uploads/1/3/4/4/134491006/nigovegizo.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/ladiwuzetawedi/pupuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/is_procreate_app_only_for_ipad_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/fusion_360_sheet_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/23070293312.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/2004_ford_focus_engine_coolant_temperature_sensor.pdfIn PDF document text
    • http://nezaxominif.epizy.com/39802985794.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/pinulizarijaleda.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/zotenata.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/nekikojizaporamiz.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_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 5436 bytes
SHA-256: dc5cd5a365e13a2a214651704d69314e45b2fa6636b1e029d17b363e81aa648c
font_01_sfnt_off0000f371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF371 10144 bytes
SHA-256: fc98a8b097e44fde507bbe182bf158c88b8e83348d740836f90e376c8c0b09ac

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