Malicious PDF — malware analysis report

Static analysis result for SHA-256 173c2aec4997f672…

MALICIOUS

PDF

75.5 KB Created: 2021-03-20 08:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ab673b71f61d7268ad06c77b368af709 SHA-1: b2283d29a7f3c8ce0a35fb1acb45c4cb28e1f4ef SHA-256: 173c2aec4997f67269d64ba6e26c0910a590677c73983fada6d9a281ae1530fd
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://jacksth.ru/award?keyword=dibujos+colorear+unicornios+pdf PDF link annotation
    • http://pixujuxe.mypressonline.com/20364352148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416791/normal_5ff65dbdabea7.pdfIn PDF document text
    • http://metiwizonud.getenjoyment.net/cessna_182q_poh_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_603bf1933324f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454179/normal_5fd2690abba8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490724/normal_6005d125a67cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497075/normal_602f4fc213c4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_605440c81fdf8.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/how_do_you_start_a_horror_story.pdfIn PDF document text
    • http://tamasolesodaj.mypressonline.com/picadura_de_garrapata.pdfIn PDF document text
    • http://mazipuvaxa.mywebcommunity.org/pikepezadoluzepotabazux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_601dbbba64829.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/lososimap/runatativajabujifuputa.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/fizedulomiwuvovazalub.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/biroxek.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/4032542408.pdfIn PDF document text
    • http://mojozore.myartsonline.com/digestion_de_lipidos_bioquimica.pdfIn PDF document text
    • http://vawanumezal.onlinewebshop.net/96297955321.pdfIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_d91fbe05a1b74e7eb3c2997023ecf771.pdf?index=trueIn PDF document text
    • https://0f939073-77d1-4307-aaa8-42539c8515e3.filesusr.com/ugd/85c9df_083da52e37f4478fab542fca69fd8b06.pdf?index=trueIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_cb2e1de69dee452896a37e30698d1658.pdf?index=trueIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_2079bf80de8c48549c5260dd25f9664b.pdf?index=trueIn 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_off0000e738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE738 5364 bytes
SHA-256: a75ae3582d72b7bc6a0d773f348f6fce9d0680061cb4cf75b64a3b509a828c30
font_01_sfnt_off0000f986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF986 11436 bytes
SHA-256: 2f54fd2b7098c0fd910a55f17152f521fa2945ab4a33e1b3e8a203b8813c5b7d

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