Malicious PDF — malware analysis report

Static analysis result for SHA-256 403e8e71b052f176…

MALICIOUS

PDF

85.7 KB Created: 2021-03-11 01:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9b398732e9eaade573dd1139a4f1a72f SHA-1: c7da5d8fbfde9547dc23d8a859e05f712b64eee6 SHA-256: 403e8e71b052f1761a6d3b35ce85b9165175eac31e548a62199d885f2f99a338
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://xajibur.ru/award?keyword=jspdf+table+example+jsfiddle PDF link annotation
    • http://smartcreditcheck.info/messenger_lite_apk_for_android_2._3s7gnb.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/the_servant_as_leader_robert_greenleaf_summary0t74w.pdfIn PDF document text
    • http://lerob.info/tojizopejadom3kdfe.pdfIn PDF document text
    • http://yoga-fitness.space/hamlet_act_1_summary_sparknotesp1jy9.pdfIn PDF document text
    • http://itmax.info/what_fuel_does_a_stihl_blower_usept999.pdfIn PDF document text
    • http://montana-media.com/748160795388vu6k.pdfIn PDF document text
    • http://vclean-sale.shop/70287233841j4kdd.pdfIn PDF document text
    • http://vodoroding.info/sekunevonubeid9q6.pdfIn PDF document text
    • http://spindlndou.space/89844890042wo2ad.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/how_to_make_a_website_godaddy_wordpress.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/que_es_un_ttulo_de_propiedad_en_mxico.pdfIn PDF document text
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/xobafikabo.pdfIn PDF document text
    • http://xeeewq.xyz/zerinudotohkz8.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/belebonigugavozuvof.pdfIn PDF document text
    • https://fusarutuzazeni.weebly.com/uploads/1/3/5/3/135346017/0f6ce9ced7567.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/5507334b52f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vawirir.atwebpages.com/5985792597.pdfIn PDF document text
    • http://titugol.atwebpages.com/what_does_f1_mean_on_kenmore_oasis_washer.pdfIn PDF document text
    • http://tulifal.onlinewebshop.net/how_to_play_havana_on_trumpet_notes.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C8 4936 bytes
SHA-256: bca84e76415cf2649fce1707f4b99a2ab08588ee43e3b7407c04af831615be4a
font_01_sfnt_off0000f493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 6520 bytes
SHA-256: 32358e11195b7bc74dc69b1ec77337797b27d2319967fb2d51345f7f977fbe63
font_02_sfnt_off00010686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10686 16452 bytes
SHA-256: e7c8b31398d996b796e6c11d1acf563c9becb0db1115e3fc1b1db5aacf8a176e
font_03_sfnt_off00013912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13912 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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