Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a4c5e23611db01…

MALICIOUS

PDF

81.2 KB Created: 2021-03-28 12:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1cc902007ac1be6fc22345b7952ad5fa SHA-1: 3de19281a528983a7e8c933ac25f4d6940edadce SHA-256: a7a4c5e23611db0107d3ea9c6dd291672f498d81c184ea52b754b841fd366885
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://jumiwimov.ru/123?utm_term=background+ppt+tentang+pendidikan PDF link annotation
    • http://gratoram.site/nusetoreramanurokpivi6.pdfIn PDF document text
    • http://gobigs.space/suvaxegofjffz.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/aditya_hrudayam_stotram_telugu.pdfIn PDF document text
    • http://ganedoxumizaj.sportsontheweb.net/xesijumozuxosanoduxolokix.pdfIn PDF document text
    • http://masito.space/blue_bossa_backing_track_150oc88y.pdfIn PDF document text
    • http://vitetiw.getenjoyment.net/nevada_common_core_standards.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/vikari.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454966/normal_5fdf9e1925567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473403/normal_604979555da94.pdfIn PDF document text
    • http://bestrongbyg.com/crusader_kings_2_best_attributesroi13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5fc75ad7b9a44.pdfIn PDF document text
    • http://peskomment.ru/671699841949z8zk.pdfIn PDF document text
    • http://novazeku.mygamesonline.org/58054920903.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/dd_campaign_setting_books.pdfIn PDF document text
    • http://pilarivem.22web.org/chimera_software_64_bit.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/jokerugiz.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/farisevemuguwesalubizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445103/normal_603889babbe37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417414/normal_6001125400f0e.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/29021246506.pdfIn PDF document text
    • http://devedilazabu.medianewsonline.com/brain_anatomy_diagram.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxegejuw.atwebpages.com/cedron_propiedades_medicinales.pdfIn PDF document text
    • http://peragodifi.epizy.com/warriors_dont_cry_summary.pdfIn PDF document text
    • http://merapenerabari.myartsonline.com/zefapumofutupabujinisa.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/who_is_the_voice_of_the_mandalorian_main_character.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

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_off00010184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10184 5144 bytes
SHA-256: 91c26fc13e876ebe9fc643babdd8e10eff1681fe6c69af9a0e8c8ef99a36dc54
font_01_sfnt_off0001131a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131A 10476 bytes
SHA-256: 3bb516800e44d0fb1535cfa7d05917c4d83088b548baf1fd18458d55771cd68f

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