Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76c151af9eaab0a…

MALICIOUS

PDF

85.6 KB Created: 2021-03-20 20:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6ed708f726a6e7ad163357cd4808012a SHA-1: 10dde934a4b2db1d5c74e131cc6aaac1fbc53af9 SHA-256: e76c151af9eaab0a3d18f1978d4da645fc39fb5a7e5dd3b4a3ffc21be0543511
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 0.9990

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://resalured.ru/strik?utm_term=un+curso+de+milagros+leccion+329 PDF link annotation
    • http://winoorama.site/what_words_describe_clouds6jpcq.pdfIn PDF document text
    • http://tranquils.space/tinyumbrella_64bithxkzb.pdfIn PDF document text
    • http://onlinekartiadesi.com/mamareneworelzl2.pdfIn PDF document text
    • https://cdn.sqhk.co/palugalanivo/eJfjggf/weidmuller_8_port_ethernet_switch_datasheet.pdfIn PDF document text
    • http://sandwichhq.club/piveworihx4.pdfIn PDF document text
    • http://acgmgroup.ru/pawejosofoxojuvenigb3hq.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/ePicibt/werutunefowupa.pdfIn PDF document text
    • http://midesamipazizuj.scienceontheweb.net/92472411125.pdfIn PDF document text
    • http://silvanozito.online/jonomudagopazimoxibaruputxxuo4.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/gdgcxoM/bts_songs_2020_stay_gold.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/35415216209.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/gd3ghAJ/19823251012.pdfIn PDF document text
    • http://itfamily.pro/projeto_x_dublado_filmebo43s.pdfIn PDF document text
    • http://artistichomesolutions.com/what_einstein_told_his_cook_2esdt4.pdfIn PDF document text
    • http://goshop32.site/3962518967734vs2.pdfIn PDF document text
    • http://megalit-korolev.ru/stocksubmittertblnu.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/estructura_general_de_la_metodologia_dela_investigacion_cientifica.pdfIn PDF document text
    • http://meetchat.space/111398448676ypay.pdfIn PDF document text
    • http://wildber.store/definicion_de_productividad_segun_autores172vg.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/ifibVgj/vukufakuxopanu.pdfIn PDF document text
    • http://trackcreditscore.info/82293256641fxzox.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/a9202a0c-1210-4d8d-ade9-38de37613a54/dell_studio_1737_ssd_upgrade.pdfIn PDF document text
    • http://tajiroxajesolut.atwebpages.com/learn_russian_free_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80e6905-d54e-4d43-a763-7745e4f00a82/biletupeluriluxifod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/914b6c39-8c35-499e-a918-e914b88e1333/penny_stocks_on_robinhood_today.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 5700 bytes
SHA-256: c63c90c3aba43bb73261e721fffde3a0dc14dcfc591375ca90620f857b6b842c
font_01_sfnt_off0001060f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060F 13544 bytes
SHA-256: d1bde32f144627b8487f2815fd4dcac645726b04b4994f1e9f5f1df441ff8d29
font_02_sfnt_off00013059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13059 16448 bytes
SHA-256: 4972c892cf783310df7ebe7a43044f7b4e4d650808add06809858f2f0e6eeb09

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