Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c949f470f7be10…

MALICIOUS

PDF

78.8 KB Created: 2021-05-24 16:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1fff75806fab148fa75fc244f1ba7e74 SHA-1: 4bb1e66b84c14c005e9ff4f3a6a54cdad4c61719 SHA-256: e5c949f470f7be104e5b26e68670aa48e48864641ea183c89bf60251a0c0d2e4
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass external link farm and is flagged by ML classifiers and ClamAV as malicious. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, consistent with phishing or scam tactics. Although no scripts were directly extracted, the PDF structure and numerous external links suggest it may be part of a larger phishing campaign, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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) documents that carry no urgency or charge/dispute escalation.
  • 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://kuzutuzo.ru/strik?utm_term=dennis+cathy+advokate PDF link annotation
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/6d501a34dd6.pdfIn PDF document text
    • https://finikepimu.weebly.com/uploads/1/3/4/0/134017618/c46f0def2.pdfIn PDF document text
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/54b96d6bfe56a1d.pdfIn PDF document text
    • https://lamosafobe.weebly.com/uploads/1/3/5/3/135322951/436371.pdfIn PDF document text
    • https://bivojivowuru.weebly.com/uploads/1/3/4/7/134726538/173398.pdfIn PDF document text
    • https://fenuwobubejugud.weebly.com/uploads/1/3/1/4/131454420/letagurizulamon-robobumarenivib.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/lorerexeg/boucles_violettes.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/xexikokakevipenaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00987377-3641-45ed-9902-8a1fa3e21602/beethoven_piano_sonata_13_pathetique.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/jurinivozuvidedix.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/dcpds_army_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/pexubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b2e114-a608-4963-854b-c00f43ac8f0f/jimavejipevevukuwuvepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daeae78c-73c8-4731-a498-3f040a02b633/the_prophet_of_yonwood_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/33127161406.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/48184836023.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/muvetuwoligimerasaduwopu.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/cadbury_cocoa_powder_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/akreditasi_jurusan_di_ban_pt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabbab2d-34fc-467e-bb07-fab76001b8e1/83479023779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c466856e-cd44-4c2d-ac9c-ce72fa6d0f79/when_should_you_do_a_final_walk_through.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/digital_design_software_free.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_off0000f4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CB 5124 bytes
SHA-256: db1adae972a3041a9169e95333b88315c9e719952df5cdc72466507e21218561
font_01_sfnt_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 11212 bytes
SHA-256: cc3e6407c53aa1b82832f4b2935f17299310c3e2ff3aded045fecbf7b7dcd7ac

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