Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd068f06fcdf3937…

MALICIOUS

PDF

78.2 KB Created: 2021-09-02 12:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2842486577672d649aee9801871fb1de SHA-1: 49e16b03303c317500f873fbcbf2006eb4eaed6c SHA-256: fd068f06fcdf39371440d734b9bc498870658949ad06197f1ac07524ad2c058f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=minor+scale+piano+pdf PDF link annotation
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/23064723303.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/59573339090.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/5ebd4havk6mnmum4nk2rpp7qpn/kumamumololosev.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/rudipukepusaxi.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/70464256277.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/9e7bfbff65387526caabf47c9d2fd076/15352884514.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/soxopeworabonobezebi.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/65828830532.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/rn367ojg214m4pbeue1dkta23n/60508815193.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/jalizidit.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/mufudu.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be75bf69cc9---farisefose.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/80835104797.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/bomilaxatur.pdfIn PDF document text
    • https://er-cardiff.com/eurostyl/photos/file/nikazilelisumotagunedovu.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160830db29d0d2---61802998051.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/24ce5b84d33613aea854726f744d35c2/suzilu.pdfIn PDF document text
    • http://brainerdhs71.com/clients/0/08/084bd9d902c6a1e3ee48703551c87841/File/xolejenukogirawinaxut.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160afd6ff71ea7---mokuxojorigogufekegok.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/4e0def797c94846781e31ba47887b811/fuzudemegajijekofurapure.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/woxejofipisawepoxaxatato.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/dde468c5a0683f3da46bd28e7265f6cb/fofaxetemudu.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/46145213554.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_off0000cd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6E 10508 bytes
SHA-256: 2f521c7d45b2d3b1ee7ad01482fb866b3b9c60be489ecd9a783a8d183247ce98
font_01_sfnt_off0000e567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE567 17844 bytes
SHA-256: ce26e170329e5ba1526169e213db7ae318526f105faad787cf7c9bd87aeb84d3
font_02_sfnt_off00011347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11347 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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