Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57a6294affa70bf…

MALICIOUS

PDF

63.3 KB Created: 2021-02-12 09:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 86ee02afc8f7e0c0aa2644d10a0c16e4 SHA-1: 699d761467b1cc1e65a14715ee4b1d41b7552559 SHA-256: f57a6294affa70bf25acb6b8f2ee292b83b8db09dcfc400ebbfa2b62a3774bd1
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=nonlinear+systems+khalil+solution+manual+pdf PDF link annotation
    • https://kemigaguni.weebly.com/uploads/1/3/1/0/131070112/3732436.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/jujdSVI/52311380802.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/QheNjgm/2834067391.pdfIn PDF document text
    • https://jupepirime.weebly.com/uploads/1/3/4/3/134313464/puzagufu.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/mozedijiz/savulimemokifabolixago.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/bararazinawebezese.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/canon_mp25dv_printing_calculator_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/63738967219.pdfIn PDF document text
    • http://gosovugan.epizy.com/lepazamidotimofurari.pdfIn PDF document text
    • http://segigeserife.epizy.com/word_cookies_coffee_level_18_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/fincen_beneficial_ownership_rule_form.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/50353686742.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/zaluzilufigedesovatifi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/sql_server_format_date_yyyymmdd.pdfIn PDF document text
    • http://lenegimuni.epizy.com/detepobigunijilefix.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/totoxeriwozilumazovarag.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_off0000be5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5C 5416 bytes
SHA-256: cb9890a58d06f82b8f5bbc4f835f90c435fcf570897517153cb5720f276458a4
font_01_sfnt_off0000d0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AC 9284 bytes
SHA-256: 5f70022113b57350d6b73635efb209ab483fda704b69f2400d0f445635a05109