Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48b6e8b7fb6286b…

MALICIOUS

PDF

79.7 KB Created: 2021-03-25 05:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 44e4000d53c958104b7f15f448d41f8f SHA-1: 9089f61980730d9fa9e8cb3009d203c2da4d4dbd SHA-256: b48b6e8b7fb6286bc1bb6ada1ef1a8f70014e7629b3f6acdea310d43bf044021
186 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 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=ti-84+online+calculator+download PDF link annotation
    • https://cdn.sqhk.co/silakozafi/icimGFy/91163618947.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/pigowa.pdfIn PDF document text
    • https://wuzitefagoxu.weebly.com/uploads/1/3/1/8/131856046/5707959.pdfIn PDF document text
    • https://cdn.sqhk.co/wemavutulow/gxq0gfs/dewugilepixezifopakudajef.pdfIn PDF document text
    • https://nifabixiguwo.weebly.com/uploads/1/3/5/2/135295020/e7b3093f.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/xopetikixumoba.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/dyKidjc/74965054748.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/dJQjjhi/european_war_3_apk_mod.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/how_to_service_esc_on_2010_malibu.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/jgLiijc/alien_swarm_reactive_drop_parasite.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/nonipesikiri/charlie_and_the_chocolate_factory_squirrel_scene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/045d9fe6-a964-4f0f-936b-c85860d6f86f/weber_grills_charcoal_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/kutube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41a40ad-ff82-43d0-9708-2e72e9775873/poboza.pdfIn PDF document text
    • http://vexolofifete.atwebpages.com/30279607704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b4bd36-ac16-40cc-a01c-55d660257677/garmin_gpsmap_64x_handheld_gps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4714035c-78dd-439e-8ec5-8c003342dd83/bumojutami.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/wurikemopetufajekobuzo.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_off0000fa6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6F 5108 bytes
SHA-256: 7d3bccef258551edb394b6127acd8f362e8e1709bc1574145ee2e9adca08eddf
font_01_sfnt_off00010bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFC 11012 bytes
SHA-256: 7a41bcd3b084ec4e3e9c0e9e4d084606de4350376ba2e40801d9f3ecb07bd1b8

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