Malicious PDF — malware analysis report

Static analysis result for SHA-256 95805b701bbe9f11…

MALICIOUS

PDF

90.4 KB Created: 2021-07-30 21:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 772d6d34497b5e2451593b8a34054192 SHA-1: 0cfbc708c0a21f30013497ba39fa8e29339536b7 SHA-256: 95805b701bbe9f11b7b6aa0de2e3aac66bc88d55721aa7b045f983648a2c6439
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting. The heuristics indicate a link farm designed to redirect users, likely for phishing or SEO manipulation. The ML classifier and ClamAV detection strongly suggest malicious intent, with the embedded JavaScript potentially serving as a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=how+to+make+cold+foam+with+nespresso PDF link annotation
    • https://scanclean.bg/upload/ckfinder/files/ripifanorosibadazekasi.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/70295442757.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/unnvbqmnciilcefoqk87hnuqkp/79635446396.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ec715c5aa26da17c13a4e2a661444a36/47256004169.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085f39267952---pubebilo.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/ed4d148d9268e1fc343451ec3990d4ca/rajadefasenop.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/bcd2f8941747b214c39349d782f2c033/61785746495.pdfIn PDF document text
    • https://mmszke.hu/files/file/6071012226.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/67548087069.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/mikiwa.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/def6f9743a1c425a81c0e11f1ecb660b/85100402085.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/waxurajowufe.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090055568424---worudog.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/vumezuw.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6b5d8231271965253a48e65f6b69e1d7/xudovabirogu.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/suviniwewabibonun.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade33c55950---23541291095.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073a27263848---farazulimidez.pdfIn PDF document text
    • https://curvy.tw/upload/files/21759757629.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/1218ikmeo7lvgflg2g18k264nr/sudufaninasen.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/fd81e736fe30dedaa51297134bad37bc/wutev.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/rejifinapoporimigodopeku.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/15482714731.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF988 11056 bytes
SHA-256: b54a05e12e97a22f86439d4c51483405a438223a7c410c0e90caa979b9b2fa88
font_01_sfnt_off00011310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B22 18472 bytes
SHA-256: 7f6b0ec0c3fe9d53d6d9e7fc576ef36a2912498729ab17d3ebbb04d2e4993e4f

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