Malicious PDF — malware analysis report

Static analysis result for SHA-256 d899b1d78ac5b969…

MALICIOUS

PDF

80.9 KB Created: 2021-03-26 09:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cf6002f62f4ad020182c4d18099059e8 SHA-1: 57e2f0759f2dd6e3a147e34507f64874a6620fdd SHA-256: d899b1d78ac5b969a15a1979a2cbbcdc9fccdad2bb97b1067194912b7accb911
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-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://soxebez.ru/award?keyword=arquetipos+femeninos+pdf PDF link annotation
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/fapaf.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/c1807ab094f6730.pdfIn PDF document text
    • https://zibinileder.weebly.com/uploads/1/3/4/7/134748255/kunisaguv_gimuvinubowofis.pdfIn PDF document text
    • https://wifamiwipefap.weebly.com/uploads/1/3/0/7/130738562/nujifoga.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/d03bb9f9-2ec5-4e01-bda8-1e2be87542b4/dozijo.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/xegezomogud.pdfIn PDF document text
    • https://921790ca-7b53-43bd-a25d-275d6f056404.filesusr.com/ugd/9d24cb_e38b86c401b449b6aff5ca4ebc7abb5a.pdf?index=trueIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_1e1576d9d5dc4936a06736d5a1c5fc81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/linenomoniw.pdfIn PDF document text
    • http://silijufomil.epizy.com/how_to_charge_razor_e200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8b4f34-e823-45a5-970b-6a67c5f23b1d/sakibij.pdfIn PDF document text
    • http://newefupu.epizy.com/suvekixuwogegal.pdfIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_7905e54d6875492787b11ac0690f32a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/gurorefukarekadoxeroloxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a9a434-2ad6-44bb-a9c0-67867c3cbebf/korg_microkorg_xl_plus_sounds.pdfIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_326c5d51e5754fc191e16e7a0f35cea7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1d621f-673c-4e57-90a0-5a4eb29d44c6/josisonegilugexaki.pdfIn PDF document text
    • http://jojovezelel.rf.gd/tabla_de_varillas_de_acero.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/23517629183.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/flight_simulator_x_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/gilafosesujowifezenufid.pdfIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_56acc51858354cf1bcf78013b03f0362.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBA 5060 bytes
SHA-256: 6ce13bda79b1b7db693562590c6cc37de19c8e5a87fcd0e60b8f26b6caffd694
font_01_sfnt_off00010fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDC 11288 bytes
SHA-256: 830b8240f56a984d20e3018c62ab82ac9ec4d733dd85510bea7ca277986f7f3b

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