Malicious PDF — malware analysis report

Static analysis result for SHA-256 313e40dafd25a4e5…

MALICIOUS

PDF

76.3 KB Created: 2021-02-13 05:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 652c9aef52afd61af2d341273c69369a SHA-1: d10efcaa8b345d8fdec88597e520b9e76e8ee67b SHA-256: 313e40dafd25a4e590bef31c41a42a65ace914cdd0e347b08fe595fb769fec98
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=aarp+tax+aide+site+locator+2020 PDF link annotation
    • http://legendarycraft.ru/bacaan_surat_yasin_dan_tahlilwshkt.pdfIn PDF document text
    • http://selolaz.66ghz.com/rikim.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/ketogenic_diet_definitionrf0cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474192/normal_5fc7b89720d19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fce51bcc77b5.pdfIn PDF document text
    • http://yblda.fun/uc_browser_software_karo6pwc0.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/pirofopafu/mitavopedegije.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/vidmate_er_3._15_apk.pdfIn PDF document text
    • http://jiporiri.rf.gd/16178658886.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/sumo_deadlift_form_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/guia_de_cetoacidosis_diabetica_ada_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/cdc_travel_information_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/ponajivuvupusa.pdfIn PDF document text
    • http://faduzidivatakid.epizy.com/98633466057.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/18550779686.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/fosid.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/dugibo.pdfIn PDF document text
    • http://pisuwemale.epizy.com/xepabato.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_off0000edba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBA 5400 bytes
SHA-256: f624aed64567c539846d25b9f3d74ec462ef42a02cd243bf199bf20344e7b73c
font_01_sfnt_off00010028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 10640 bytes
SHA-256: 9ff24b62a96235f79a15dfbca8ef0c38b9c7c79e7687d671943c80c4a3544815