Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2b9013813d6020…

MALICIOUS

PDF

76.8 KB Created: 2021-03-29 19:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a6a97497339619417e1b503fc79ea0d7 SHA-1: 12ce21582e3e3136cb3e2aafc05da63b00aafd60 SHA-256: ab2b9013813d6020a6d4171322610f5b0cea5c90c81d7bdb6e69ab8458401be2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/123?utm_term=halloween+2018+google+game PDF link annotation
    • https://cdn.sqhk.co/towevefizub/cj2Cojb/42477238935.pdfIn PDF document text
    • http://dirozigumifew.scienceontheweb.net/4236699914.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/kabedojolesipeban.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/how_to_minimize_and_maximize_windows_using_keyboard_shortcuts.pdfIn PDF document text
    • https://cdn.sqhk.co/gikokimofegi/hgiOjjt/9173876008.pdfIn PDF document text
    • http://pifowovumuwe.medianewsonline.com/employment_contract_template.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/ioSxezG/meramizogagovifus.pdfIn PDF document text
    • https://cdn.sqhk.co/nalogigoke/aibSIjd/vataken.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/iiFTggw/tudovawojo.pdfIn PDF document text
    • http://bonugonir.22web.org/92439799866.pdfIn PDF document text
    • https://cdn.sqhk.co/pupoxobumake/j2XLhhX/endometriosis_treatment_rcog_guidelines.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/apprendre_le_portugais_brsilien.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/304859e9-187c-4498-ade2-65e67bfd658f/download_synaptics_touchpad_driver_windows_8.1_64_bit_toshiba.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/dumifivazawog.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/practical_english_usage_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86acc9cd-5bca-4093-b522-250fc6a9b276/how_the_grinch_stole_christmas_full_movie_2018_english_free.pdfIn PDF document text
    • http://fabibobitobabo.epizy.com/juzavemujezudoxezofavilan.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 5304 bytes
SHA-256: 9846c58ad8066e32976cfeb2541d7dacf0e70e70cd8c33acf42e031051802e4b
font_01_sfnt_off0001012a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012A 10868 bytes
SHA-256: c09cf8a3698cbd467576e6dbaf2bef3217f622f8ac57706dfaf70b4c8040209e

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