Malicious PDF — malware analysis report

Static analysis result for SHA-256 def17fd494a17db5…

MALICIOUS

PDF

71.5 KB Created: 2021-02-27 23:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4417979b5cba93f18a3072cc50f38c43 SHA-1: 668e2eebbf6245ee3e22321110d84187b6c68a74 SHA-256: def17fd494a17db5212da0c339c76fed18a0861682029b5c61d166b109dc0fa8
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://zajinet.ru/wix?keyword=biochemistry+review+worksheet+carbohydrates+c+h+o+answers PDF link annotation
    • http://fastpysystem.online/titulos_de_credito_definicion_doctrinalapdyv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486197/normal_5ffba9d26c678.pdfIn PDF document text
    • http://boomua.site/variable_dictionary_template5ls4f.pdfIn PDF document text
    • http://50offshop.pro/42088797727ks0v8.pdfIn PDF document text
    • http://raffle.website/the_judgement_day_devices8kf0.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/pazaftpfb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_603283d012408.pdfIn PDF document text
    • http://esportzmlevent.com/bitcoin_wallet_app_android_apks3xsm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380073/normal_6007cc79030d4.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/gofilafixu/cen_tech_battery_charger_3_in_1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/affidavit_of_personal_service_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/altiplanicie_mexicana.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/rplidar_a2m8_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/84158511732.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/international_marketing_executive_salary_in_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/zejidokolamugupadek.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/animated_video_backgrounds_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/makalah_askep_atresia_ani_pada_anak.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/pipavuwaturaxobovokadev.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/77584161292.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/67425834502.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_off0000d837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD837 5656 bytes
SHA-256: 4e958a2d5d88a83e9c1625fdd98fe2199d296c43a7525bbf3c206b63c22a4939
font_01_sfnt_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 11272 bytes
SHA-256: 52fe0b4c8e0a9fd52e7bfaa9d862421f89883a7d5b627a517a85979830c4ae6d

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