Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d600cce37f51927…

MALICIOUS

PDF

80.4 KB Created: 2021-08-17 10:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 18ac93732f2bf6ef775d5aa3e1a521cc SHA-1: dab3d51dac25c8f75759f39eab90ed1bea4b95fc SHA-256: 4d600cce37f51927ecbab056fabd7ed825ad406ce5a52a6de0218e1a60e34ff8
156 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The primary attack pattern involves luring users through deceptive links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/0b55316a84092928ab6fae6425cfa784/perilinolagi.pdf In PDF document text
    • http://le-bouquet.be/userfiles/files/kisefomulosekawameko.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/153d327910a57646db24eba1f789f7d8/3444795843.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/fofifebineragor.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/21348586146.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/ttl2mte7vk1kkeg5gltgltifqk/vulekegep.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/3908221924.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/6248301179.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093b1a6daff6---tidepi.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210528_7CD7E884BFDA60C1.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb350d82c9c---96771512703.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/pefami.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/28735451040.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/bedobiremojuguxasulori.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f9bad104d6b---koris.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/xisobupi.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f36c5a7a4---junukojojigixadu.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/bf26a24aa0ba7c16995f9f6e7902ec41/zegoxowagabudip.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/48c5e906b75fdc9b8f17cbf556394bdd/movavogevatemigomozakuju.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/083cded38866831263d71afe3f74b5e6/96182571176.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/vegitajebawenuwufimevum.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/77406484353.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf7050acd5---12936432942.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/2696550517.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=grow+taller+pdf+free+downloadPDF link annotation
    • 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_off0000d4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A3 17692 bytes
SHA-256: dbb4acf5eaaccbe16dbfd66b8068c6570b86b6af06d5ded8123e9229de05f98d
font_01_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 10356 bytes
SHA-256: d42ed728d897ae1c8be2363918e0092dc79630c68de15811a69eae37ff63d1a6
font_02_sfnt_off00011a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1