Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fce62882e2a985…

MALICIOUS

PDF

90.3 KB Created: 2021-08-08 05:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 82f218da7057e8eb777c1c0afede458b SHA-1: c6338dd4e5a089f924c024bd603ab31ef1836573 SHA-256: 79fce62882e2a9853da143e8f771bf718824e758aa6f1b5a4640941e0197db22
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • 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.
  • 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://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/315aeeac6ab124ad255427d51fb0df2c/kozusadidetawawoboxeri.pdf In PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/cb8b422f44ab4b0d03f7e0a463aebfeb/fiwid.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/88929175592.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/32358234322.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16098dd0f22763---gekopezixapufujoxivozitu.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/fonawe.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/takodalubigili.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075ec3881b06---35411585815.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/15088489445.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/7ruqv8al87h8n00pcqpos7p33g/11494087628.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/88355912391.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/06a16f62d0635d064fc7ee9dd173cc9d/18452787350.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/3fe27a18a7ebc8347a372cd8d0d59d5d/24294115785.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/gixululiluzasovapuk.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/c5dfb4aface8f5d2c04ad2a8777d9cc8/xeriluk.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/df7a06256b2884ef933716fe2526ebaf/59094291798.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/f4gas920u7h1fnptjbihoth9c3/divusukuju.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160ad780b22f8c---dobedutaxeloxegigusutew.pdfIn PDF document text
    • http://humansharehouse.com/userData/board/file/gutesilopixabamo.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/p3t9uktc45cgiir058fqr6rgek/wixurewodime.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25822db1e5---pufofo.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/v3qv1p612tlt1l3kpfjtv0vkok/kazokedatajenaraviwepipud.pdfIn PDF document text
    • https://ecoretras.com/file/dufagufewaxo.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/sulesapujesaxubomapikip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=el+test+de+la+familia+ficha+tecnicaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D2 19156 bytes
SHA-256: 1c0b3973d4c6562cbf4181ca50e38d573c14bf36b990d6da0b1b98c92199cc96
font_01_sfnt_off000114a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A9 10504 bytes
SHA-256: 43fed4b8b27b5bc8a7d8bcc2f48508a02a57dfe6d917131f6c93bf4580f9479a
font_02_sfnt_off00012c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4A 16064 bytes
SHA-256: 313b4d1b1f982e25284d2f4e6caf7c0c7767db1f375da95b613bc7d89e59efd8
font_03_sfnt_off00014160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14160 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.