Malicious PDF — malware analysis report

Static analysis result for SHA-256 054dd38afa8846d4…

MALICIOUS

PDF

78.3 KB Created: 2021-03-10 05:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 820d7f2c04678da5b161105c72601d77 SHA-1: 125859f2c0f9c9306d8ed89e3dc354dd2c0c899e SHA-256: 054dd38afa8846d4f0916ce24731143ceb0e329eefb13bdc7d056bffa7abe36a
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 0.9996

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://kuzutuzo.ru/wix?keyword=alphabetical+order+to+the+third+letter+worksheets PDF link annotation
    • https://cdn.sqhk.co/godidudawat/hhbidhf/80335246524.pdfIn PDF document text
    • http://myfavoritesun.xyz/duxiwajototorememw2fm0.pdfIn PDF document text
    • http://katermore.ru/el_mundo_de_sofia_sinopsisfaofz.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/sjage3i/pokemon_tv_show_list_in_order.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/bosch_es_4-1m_wir_element.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/biology_book_in_bengali_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5ff7730f1ae04.pdfIn PDF document text
    • http://socialwave.me/free_movie_creator_software_for_pcjaqsr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_602865cb8aa50.pdfIn PDF document text
    • https://cdn.sqhk.co/xarobumevux/9ibgcX5/20508057263.pdfIn PDF document text
    • https://jumaredutidab.weebly.com/uploads/1/3/4/3/134310232/sarovakirozarofus.pdfIn PDF document text
    • https://noxijinijomud.weebly.com/uploads/1/3/4/7/134746703/2968599.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/tokisaxororuzopevipojiril.pdfIn PDF document text
    • https://dopitusorotid.weebly.com/uploads/1/3/0/7/130738794/powevupoti.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/jehfhb0/66208921294.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/sirozokojedodobu.pdfIn PDF document text
    • https://mirulunus.weebly.com/uploads/1/3/1/1/131164386/bojikevomemixuluxute.pdfIn PDF document text
    • http://zedateve.mypressonline.com/jesejapizamoxezabewoxivuf.pdfIn PDF document text
    • https://rabuwamefikulo.weebly.com/uploads/1/3/1/3/131398373/subatunimakejo.pdfIn PDF document text
    • http://rodsfish.club/53875798830cycpc.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/fulazelof/37900359562.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/35506279248.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_off0000df98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF98 5444 bytes
SHA-256: 91989b4eecfcee1c5ba48181abcbb7753ddab6ab0a4401b3dacdc62f014489d2
font_01_sfnt_off0000f21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21C 10268 bytes
SHA-256: 35468a616053ff47d35d27cc5f2b17d7f560715eef3fcce258879d65eb2eb073
font_02_sfnt_off00011572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11572 16384 bytes
SHA-256: 0a74fccdd03e10d65e811fe9613af658096918ac4fdb4565bb28b623844c8461

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