Malicious PDF — malware analysis report

Static analysis result for SHA-256 73cd823132593ed4…

MALICIOUS

PDF

83.2 KB Created: 2021-02-26 16:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 154df3306c036d731fcaa731d6d489f2 SHA-1: da9b5a4a88f6c1db23f88645213ba2ad63aecafd SHA-256: 73cd823132593ed43642e3f1c8756f5b5598a5917e38871890833baee517ca6b
126 Risk Score

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 0.9996

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://fokemale.ru/wix?keyword=llamados+de+dios+en+el+antiguo+testamento PDF link annotation
    • https://kolofajek.weebly.com/uploads/1/3/0/9/130969684/3928597.pdfIn PDF document text
    • https://tunuwowidu.weebly.com/uploads/1/3/4/6/134606858/logosobetez.pdfIn PDF document text
    • https://rijevolokawuja.weebly.com/uploads/1/3/4/6/134661742/votilakedetudafi.pdfIn PDF document text
    • http://floradoma.net/koletawapofosadukafopajuxz2psj.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/0505f549a959b3f.pdfIn PDF document text
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/nenilatilo.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/kirusipinud.pdfIn PDF document text
    • http://hookup755.fun/13289798243joqhb.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/jebarumixexojewu.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/what_is_the_most_viewed_rock_song_on_youtube.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/97556714514.pdfIn PDF document text
    • http://pet-guru.shop/dufororajolaxenepus59id.pdfIn PDF document text
    • https://rodironamo.weebly.com/uploads/1/3/5/3/135347674/2859313.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/82188084470.pdfIn PDF document text
    • https://timifuxi.weebly.com/uploads/1/3/4/6/134676324/wukubobobegobun.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/h7hdic0/pimonunop.pdfIn PDF document text
    • https://zifosugelupoz.weebly.com/uploads/1/3/4/6/134693972/4635716.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/jcIgfij/how_to_make_anything_with_waste_material.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wolobugoxew.myartsonline.com/best_buy_rode_videomic_go.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/virus_shawl_crochet.pdfIn PDF document text
    • http://roxujewov.myartsonline.com/what_are_the_4_parts_to_darwins_theory_of_natural_selection.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_off000107f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 4992 bytes
SHA-256: 346d2d7bd4f2d017849135125bae2a4d9911ba1f7a5e7436d39e92f4600de4dc
font_01_sfnt_off000118e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E1 11924 bytes
SHA-256: 3dcdcd6fe4991ea0c583b39847821906cd2b02e72c51cbf885c3483a9e335943

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