Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ea62c33f40ad7b…

MALICIOUS

PDF

69.1 KB Created: 2021-04-06 02:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8afb4c9f68265cf790390bd2bbca0bd5 SHA-1: 5c145a1ba95eb4e298eb99433baaf99f22ddd075 SHA-256: 23ea62c33f40ad7b30ed7a67d31030d1694f4d4135f583efe54a565a00fad5de
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://jumiwimov.ru/award?keyword=the+righteous+mind+full+pdf PDF link annotation
    • http://xudisoda.66ghz.com/carlos_castaneda_italiano.pdfIn PDF document text
    • http://ginalupajeriw.scienceontheweb.net/benefits_of_whistleblowing.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/6.7_powerstroke_transmission_fluid_type.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_8fa8b1716b1f45938bbfc4809f058aa6.pdf?index=trueIn PDF document text
    • http://fokobawenola.epizy.com/adorno_horkheimer.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/molecular_hydrogen_excited_states.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/dubima.pdfIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_7e1aa925d89e4033bb7f63701a61b64c.pdf?index=trueIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_25fe94dcf3bb444c9989f0ba6399e39e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a021ec3a-f59f-46ba-bce1-fe69b6f04f38/gekeje.pdfIn PDF document text
    • http://penonas.epizy.com/xarokurofipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d90a4cb-0f7f-43e2-b5dd-4448ba4e5e5d/51380494491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b188dd68-1ca8-4b64-8ef5-b4c4b52d02a1/pokemon_super_deluxe_essential_handbook_free_download.pdfIn PDF document text
    • http://dudolisimak.epizy.com/sathanin_attagasam_tamil_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ac560b-1715-4946-a8c3-e52e7e8b55b4/how_to_play_multiplayer_goat_simulator_switch.pdfIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_15e4fa8a57134eb7b4c7b2227b915bf2.pdf?index=trueIn PDF document text
    • http://vofexepevoja.epizy.com/lenigujoli.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/33392236829.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/gru_meme_blank_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/where_to_buy_apple_magic_mouse_2.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/naruto_ultimate_ninja_storm_4_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/what_is_a_non_diagnostic_covid_test.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_off0000d2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D8 5192 bytes
SHA-256: 187ff1bda3537ab7c926b0f693607cfbe82c438be4a99f821c5316ffee4133d6
font_01_sfnt_off0000e460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE460 10232 bytes
SHA-256: c116a2399def77bf008a7e5917aef3fbb7dc77ae613da486d247517ab26170ef

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