Malicious PDF — malware analysis report

Static analysis result for SHA-256 96891e8a21a8ad6e…

MALICIOUS

PDF

82.2 KB Created: 2021-03-02 12:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0dbf05403ce9be1032f4dca94c51d75e SHA-1: 9c53d5203b68f83e9c5b131cf2b902f2f674a6b9 SHA-256: 96891e8a21a8ad6e48a3172fa063d20aeda12d6c83b6ba7bc8ad46e3f278a13c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://seumenha.ru/123?utm_term=sat+math+formula+list PDF link annotation
    • https://cdn.sqhk.co/gizoxemovefi/igjjfjc/claw_electronic_candy_grabber_machine.pdfIn PDF document text
    • https://joxureduragup.weebly.com/uploads/1/3/0/8/130874613/divisetak_xider_tujusaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_600f334084f96.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/e3f675d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_602b7a7222dca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_602ad3a3e836c.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/jajoxulabojaso/fipebenakutamipa.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/kabir_bengali_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/modle_cahier_des_charges_maintenance_informatique.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/munujigununopajatosax.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/psalm_23_rod_and_staff_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/13552743802.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/jexekepigu.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/staar_test_2018_algebra_1.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/diwatimiluwugi.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_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 5108 bytes
SHA-256: 993653dcad8464ca8805e4d686a48f667a9ba55d64004ea29449610851ad0f38
font_01_sfnt_off00011486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11486 11604 bytes
SHA-256: 7126e5f86a379a590771fd664500233ac90c0b2960035d0cc730c954903da633

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