Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd49a1b5fcc4838…

MALICIOUS

PDF

72.8 KB Created: 2021-03-03 02:38:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3ed4291c099fd88b0e0fd57a51035d27 SHA-1: 91cd3a38e28214579ba96c829f7b9a9830f76b51 SHA-256: 9dd49a1b5fcc483810a650955d8a17200caeb54ce619d2add028f33f7a56a4f4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users by directing them to potentially harmful content.

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://lozipotod.ru/wix?keyword=potential+and+kinetic+energy+worksheet+carson+dellosa+answer+key PDF link annotation
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/0a77bfaa14.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/kObiigi/crazy_snake_puzzle_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/oge5ohc/african_crawler_worms.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/toxugepoji.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/nekagepevino.pdfIn PDF document text
    • https://kumisorulilinim.weebly.com/uploads/1/3/4/7/134750082/bekugal_kegiguran.pdfIn PDF document text
    • http://geniusenglish.space/vipijenizolirosklwb0.pdfIn PDF document text
    • http://ukranews.icu/automobile_repair_booksa7elp.pdfIn PDF document text
    • http://bullbananavannaone.xyz/toefl_ibt_activator_writing_intermediate6uitk.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/oA7ic3e/history_of_southeast_asia_book.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/esquema_de_los_medios_de_comunicacion_masiva_y_sus_caracteristicas.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/aOUggqV/wasuj.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/luxaduzimase/jomevaja.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/sunbeam_cool_mist_humidifier.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/2404556996.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/duke_energy_report_outage_text.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/xenon_valkyrie_plus_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/74254711691.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_off0000de66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE66 5460 bytes
SHA-256: 3374a27e57b869cfe47e91bac19392ac287d6cda163ec82106abf75cd7a13c43
font_01_sfnt_off0000f109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF109 10880 bytes
SHA-256: e9aa62680d6756ab048b1fdcc8ede78c8c75d2f01710a7a2b4433a1a4068602b

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