Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7570f76c3ca48cd…

MALICIOUS

PDF

67.8 KB Created: 2021-05-13 21:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ad47a04ddc0969812e8f1f43eb7f9221 SHA-1: b9e22bfe2fe990b29cc9c6454cd6709b42bb26db SHA-256: d7570f76c3ca48cd59e89709da65b7aeee3127e93ab51eebb390b11097545447
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and the document body suggests a lure related to stock market queries. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://midufefew.ru/strik?utm_term=is+stock+markets+closed+today PDF link annotation
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/63fb9a5a6e8d88.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodimina/aMHhjAY/what_do_you_learn_in_sales_and_marketing.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/A2Phbhj/simple_function_generator_circuit_diagram.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/amendatory_clause.pdfIn PDF document text
    • https://dijitisabotiji.weebly.com/uploads/1/3/5/3/135324222/xipofifewovinowo.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/wovokidosojuto.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/jgggihS/.pdfIn PDF document text
    • http://vexudavifuki.22web.org/nujirolixatabusij.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/FuAVjbT/viratenajufuteso.pdfIn PDF document text
    • https://tobivuzulukimu.weebly.com/uploads/1/3/1/3/131384599/najiv.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/sakevazetivetuxizagosojep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e97007-7524-4b6f-b6dc-0c60e25d0891/tipos_de_archivos_digitales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e080e4-163b-4326-8841-b4905c5b3312/40303568609.pdfIn PDF document text
    • http://tolejax.epizy.com/star_wars_book_of_sith_deluxe_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e32538d-58b3-4f8a-b284-4502f6dec111/how_to_get_a_journeyman_machinist_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7646e20-c916-4da1-88ed-cbeaaf6b7bf1/mr._coffee_espresso_machine_parts.pdfIn PDF document text
    • http://pimibini.epizy.com/bokator_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/698a044d-d8b2-4ec5-b495-adc4a23195e4/81621070825.pdfIn PDF document text
    • http://pojuzuduxotazup.epizy.com/la_metamorfosis_franz_kafka_resumen.pdfIn PDF document text
    • http://ruvatarojamun.rf.gd/your_song_piano_sheet_music_moulin_rouge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77a2576-0179-4d9a-ab5c-d85cddc6a714/58252545656.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_off0000ca84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA84 5188 bytes
SHA-256: 8ced77a58474662b1fdd69252ab0f61d8b2f78a12fc446585d2a1f3fbb1cef68
font_01_sfnt_off0000dc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1F 11136 bytes
SHA-256: 6bcf368528ee836f2f86926bdf3874b55bd6f742019855d8ebf26b2fa222c3ea

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