Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7df01d281be4f5…

MALICIOUS

PDF

94.6 KB Created: 2021-08-08 11:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 963cf9608f09337ed1985327f2bba602 SHA-1: 2b8960fac8298e3beba9545715d5e282ecf4d1ea SHA-256: 2e7df01d281be4f53a85848655140d75bf8013ad85d4ef54165aa1645e4abff5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body itself is heavily obfuscated and contains a URL, suggesting it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://irlanc.ru/uplcv?utm_term=cuantos+kilos+trae+un+metro+cubico+de+arena PDF link annotation
    • http://zrdb-drogbud.pl/Upload/file/zefuvewas.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/dumowedekowoladoro.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/wezoleketiwuwasip.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160886aa62b739---betironatabaxuxomizolewiw.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/ddc21bc22aeab0d9c632418cbddf3305/51267526297.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b1ca70821---lejumejogezugogasu.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16070b8eec0a4c---xesegerinakerajulemosunul.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/67370348079.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45c22eb3f---54029238742.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/tazinagujufusokabe.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/5182552008.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/furuxazavegatoto.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/jevaki.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/20330602952.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e506813c95---48159132033.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/36394699731.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/35879606389.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/j4f24nlt691hr4jr750nrht5jh/kosifo.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf830fbf51d---85748140730.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/27ba32266f3b4260d8fada14b64611be/leliwafonolasipaxazugoduv.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/48486469415.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/46014034182.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/zizoxabikujeletalagabalo.pdfIn PDF document text
    • https://istanajp2.com/contents//files/64156720534.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a61b19d629e---63103112359.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/45024824938.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dai5j8quufhjn1mk7ljsft5772/19326062251.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_off00010b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6E 10896 bytes
SHA-256: ddf7712dfe1eadabbf9f8325f6b82a14395bd85b491b5101297f49dc8efaf041
font_01_sfnt_off000124a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A7 17656 bytes
SHA-256: daae47bb1f640a711815d8ab6990cd08fda8f96bc563cdc58af789d0db45b694
font_02_sfnt_off0001519a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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