Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be793343ab76adf…

MALICIOUS

PDF

78.3 KB Created: 2021-06-30 20:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4f679ee186503d230c0cf959b2f9b2a SHA-1: 6a42b9bf25f4f21d089717193d14196014e06690 SHA-256: 2be793343ab76adf136bdd92f80b6b556dec5eb9ab1f4a36049eb76b6be3bef8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://krisoc.ru/uplcv?utm_term=division+and+the+distributive+property+lesson+4.6+answers
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/gu135it94qcs8ki626lp1el7dh/66273640350.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/15883130789.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec6b1d41ab---xotofitar.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/1d6647d407784e045bf15d1df11a8e69/35976297825.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a47b28dc---guxipuv.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fc899ba4c---35783152090.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/tqqh3u3l4a1bnf32s5ddfj68d1/mitebosamaz.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/mlua79jftnmihfd451euo6rjo7/70676638586.pdf
    • https://olivier-daulte.com/ckfinder/userfiles/files/bikisazulago.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/e1321218599804835fec1ab7fc4bee24/xuzozititemojukepomixik.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd9075764c---lipopapakevuzibaso.pdf
    • http://drukarnia-warszawa.pl/pliki/file/wanawavidep.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606fea778d544---kerapagafibubinonidepes.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/2aqna9r9eoj4d4krbl55c2fhkt/96726922126.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b817813f6e0---42809034369.pdf
    • https://acronimocostanzo.com/userfiles/file/55900654966.pdf
    • https://mimpishio1bet.net/contents//files/tenojosapise.pdf
    • https://mumegram.com/userfiles/file/ralezebi.pdf
    • http://kaies.cn/upfiles/file/zonarilezerenox.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/7e54a2b090ed9f5b35256b5c4cbba663/mokebubakositikobokumoto.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/a624f3586a099737a6b82b51412c36a6/zexigexevemoxesofidufozun.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609454dd3e901---49556568929.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a102617d145---16014943706.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/538df65106fca2ebd0c5e3f9e5210f98/rikobulupitag.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c995.bin
943fd732589103d4e8770f83ce576e37aca19a2bea7c63eb71d4111e5c0656ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC995 11308 bytes
font_01_sfnt_off0000e3fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FD 16792 bytes
font_02_sfnt_off0000fc0f.bin
f16f9c30d1043a14107bf03b327a72c4c948a294c9eada288f200b3ec7913cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0F 18068 bytes

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