Malicious PDF — malware analysis report

Static analysis result for SHA-256 05299ea11a277d76…

MALICIOUS

PDF

85.5 KB Created: 2021-07-16 05:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8d295795fc7283ebd7eb063c18dff33a SHA-1: aadd89b5fac2c82ee7bc899d409c77a11d707efe SHA-256: 05299ea11a277d76821479d1cee2e8e0a5e54aed9f5a68dbc62413992a16c7dc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed for SEO manipulation, likely to obscure malicious destinations. The embedded JavaScript is likely used to facilitate redirection or download of further malicious content, contributing to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=paragraphs+for+your+ex+that+you+still+love PDF link annotation
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/jha4m59d1tacp4d4rlm328bo5u/84759098935.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/a076fd6277028e764ebbe37f98623cb0/zatewipolatijo.pdfIn PDF document text
    • https://aneri12.eu/res/file/54234082458.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16094110c237c8---15529691661.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada98310e67---bozexaburud.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/5j1r1bflcu0edq3dm8lcd6o7ig/rikixudidafasisifiwobekuk.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/072acb6h2g7lfe5pruqquultk3/daputuzegelawuxafofofod.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/8f7klg11j6hi5ekr5vqnaq80n6/mexemebaru.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/dinusos.pdfIn PDF document text
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/lemeresofapigezotexon.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/fa0dd165089f74556ad1360d68680f62/21147821128.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/96741678547.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/nafuzeni.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/92145ff698c1cfcacef84c6ba39bf1db/32522083654.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/lumuduxufugureraxapisaw.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/bedegawaw.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210713211359.pdfIn PDF document text
    • http://falerisztika.hu/tmp/funinujubazeguxividiba.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/db64a8482d60cf9143513705c63d846e/mimatapi.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/82da363d251a825c6e10c75db300e271/leziwu.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a1887ea6e---52459606863.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/9c56050a7b9aeb8b930e65444e770083/bupuvo.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca41c1e4af---18299211104.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/66241192054.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/dpo08ij0qnhi26crgct8gsi4ig/11759454783.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083e225c7efd---62499145138.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_off0000ee08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE08 16032 bytes
SHA-256: e99e3f25e8f9d9e508f41fbaf2eeb43e64baf37f8811fe879b339d8850a3815e
font_01_sfnt_off00011702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11702 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F19 10916 bytes
SHA-256: 55c0139b68c07fa7e77ba0144a8561846d4ecf9079e1307b2c7f5daccdacb8f9

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