Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a237d3e07ed5d4…

MALICIOUS

PDF

69.0 KB Created: 2021-02-26 19:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2e24b38884f1f4bc55e5e2943926a4ba SHA-1: bf20740ba22a5750e68ba9d9c3c88688e1f133a8 SHA-256: 16a237d3e07ed5d402da01e557871eeb7985228374befe57bc4da9d084e67c45
236 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
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://lozipotod.ru/award?keyword=how+can+i+check+my+post+office+account+online PDF link annotation
    • http://roxelejabojafe.scienceontheweb.net/the_merchant_of_venice_themes_sparknotes.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/dutavojed.pdfIn PDF document text
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/df95c501.pdfIn PDF document text
    • https://rirujidina.weebly.com/uploads/1/3/5/9/135957349/lagekegerugakukamuz.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/8jaidNa/86080199512.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/ObjhTjg/like_a_blood_sport_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/vrcjabS/vsco_filters_for_dark_selfies.pdfIn PDF document text
    • https://vuverararusug.weebly.com/uploads/1/3/4/8/134883490/4805965.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/xodibovudanaromolopukag.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/lorifawuvawot/sejejobulidezotegit.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/fuderisavajijukezora.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/35071388961.pdfIn PDF document text
    • http://sudogirelokuf.epizy.com/50950814776.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/dutovufusoko.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_off0000d3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CD 5376 bytes
SHA-256: 6e7b90ab5e3caa802b3e8baa8cb4fb8b8d4bf7b38e4fbc74695d8a63c8bf135d
font_01_sfnt_off0000e611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 9636 bytes
SHA-256: 0a7825c2ed48d3534748f052ae1cb05a10262ca2aec51d99a29f68b71c8a3c71

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