Malicious PDF — malware analysis report

Static analysis result for SHA-256 0282aece468ae9e4…

MALICIOUS

PDF

73.5 KB Created: 2021-09-14 01:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a44b8778d6622422f4a2e63b02699043 SHA-1: 96ede4e915d8ed91fbd7713cd0a9a163d39fffe5 SHA-256: 0282aece468ae9e4e51fb4a8eae5527c952ea32c0fb02486c0d3d533c1b69614
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. ClamAV detected this file as 'Pdf.Phishing.Trojan', and the ML classifier also flagged it as malicious. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=how+to+turn+off+screen+mirroring+on+android PDF link annotation
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132295bce293---jazobivekowolobabexorow.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/88199981093.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/mifanugopuxezunun.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/33348933563.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2aca3deec---jawazarakofosumatapovi.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/31429094827.pdfIn PDF document text
    • http://garderoba.sk/images/_file/niwodisofutoxanavifix.pdfIn PDF document text
    • https://tele-video.ru/upload/files/57938497397.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/wazebekulovofumakidod.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/14893448209.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/11423512123.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131033db9ec5---jenesijaz.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/lipubisazuriledaj.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/30437778604.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/moxenokafoxikamubo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/8d6a3fbf7af04a42fdd4ca8f3bad5c9b/xumelezelo.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f3e995800---67061885964.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/sifiwuwusewegod.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021091014054557788.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/guwupubidema.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/zijipotukixokefewo.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/23626730329.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/dogeredudoxuko.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/kodefator.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://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_off0000bbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC3 16788 bytes
SHA-256: 1cb1a97f188c849e1d77dcf4735da72d018e6ac5144bb2600b314d89ba113279
font_01_sfnt_off0000e6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 10952 bytes
SHA-256: b95c621696f1db5fdbc15d281eeaabe5282343932cb135a94f890403d990ac7c
font_02_sfnt_off0000ffe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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