Malicious PDF — malware analysis report

Static analysis result for SHA-256 914fef1b24b626b5…

MALICIOUS

PDF

81.7 KB Created: 2021-04-07 05:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3dc50d8cb122abf08938673018ed9624 SHA-1: b4d55681980a2e18c0077c03b0c7f5214d9dee10 SHA-256: 914fef1b24b626b592280fbcacf7a97e0a1fec5296ff98ae837cb57b7840647f
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded links, with one pointing to 'https://botokaw.ru/wix?keyword=12+basic+functions+quizlet', suggesting a phishing or malware distribution lure. The presence of many links on disposable hosting further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=12+basic+functions+quizlet PDF link annotation
    • http://butalinonoruma.scienceontheweb.net/adendorff_catalogue_2020.pdfIn PDF document text
    • http://grinallex.shop/talking_animal_apps_for_androideu1cg.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/5xRiihe/69678541617.pdfIn PDF document text
    • http://gonzo-3d.com/lilazuradu0hwd2.pdfIn PDF document text
    • http://vegofejolafud.mygamesonline.org/22079068180.pdfIn PDF document text
    • http://bokaxakoz.sportsontheweb.net/92182477731.pdfIn PDF document text
    • http://xazonem.22web.org/rusifula.pdfIn PDF document text
    • http://liketsven.xyz/zovinafiturukuzugezizbheal.pdfIn PDF document text
    • https://cdn.sqhk.co/perekowemo/ugdTTHA/74987359927.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/Htrzhac/android_gardenscapes_hack_level.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/hdlyzij/sky_battle_lightning_air_force_online_combat_training.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/qRieAif/59373251278.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/fezenur/97973421427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ad1491-0fad-45a8-bec0-ea25b3e91e81/limites_de_funciones_exponenciales_ejercicios_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d562a0f-e485-4e6d-a198-1347387f6f65/anthony_santos_popurri_en_vivo_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/332052896.pdfIn PDF document text
    • http://sasaroguri.rf.gd/foxigukepimanesakatetamo.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/9224680618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae01670-bdbf-49e4-931c-405f88cac7a3/68343719302.pdfIn PDF document text
    • http://farevuzafi.rf.gd/o_que__os_4_ps_de_marketing.pdfIn PDF document text
    • http://lufepapuxakexa.epizy.com/how_to_write_problem_statement_in_thesis_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4131dca-2cd2-431a-86ef-f5ab1643f13a/acer_315_15.6_celeron_4gb_32gb_chromebook.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_off0000fe02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE02 5184 bytes
SHA-256: 18c46e88cbe5df9b1723727c5a6f52782cdf69579a77f53d042352f53511a01e
font_01_sfnt_off00010fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCD 12528 bytes
SHA-256: 58de3ce2b097f03b07a2f9e4b27021cbbad7897bb69a3fdaef1dba3b0c672b7b

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