Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a3b2941b2f2aaf…

MALICIOUS

PDF

67.2 KB Created: 2021-03-02 12:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bdf9f5b4b8d5028bdb8d25b6ad512f51 SHA-1: 3a7b71b5f27e9f3fb53c3bc6dd1d9cba20e332c6 SHA-256: 31a3b2941b2f2aaf30c1a53d9d4ab0defe0b5bc8c6e22cfe7331b49865aab8bd
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=babette+beauty+and+the+beast+jr PDF link annotation
    • https://vavaxumepanev.weebly.com/uploads/1/3/6/0/136097425/bofasapovolod-gorolagoj.pdfIn PDF document text
    • https://jelebemurufipo.weebly.com/uploads/1/3/4/4/134442628/vanibukaxo_leranosigipega_vijilapilifak_viwekejuwim.pdfIn PDF document text
    • https://vademakab.weebly.com/uploads/1/3/1/3/131380849/3649262.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/sugegarogadotatiro.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/donake/92422486483.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/fixigowa.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/shikari_bengali_movie_2016_free.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/consumer_reports_car_seats_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/vamajisorowuba.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/31626191761.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/2013_dodge_charger_pursuit_service_keyless_system.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/botim_app_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/ccs_university_exam_form_for_bba.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/what_are_some_encouraging_phrases.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/best_solvent_to_recrystallize_benzoic_acid.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/freight_forwarder_company_profile_template.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_off0000cc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC62 5248 bytes
SHA-256: 584523dbfec4f5a2d1d29f236c6bcaad64d7355ddddd44b04512744031493126
font_01_sfnt_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 9896 bytes
SHA-256: 86f32bfa7397ee624c4a2a645925a5fac872f0e7331b20b5de74c73da3399ffa

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