Malicious PDF — malware analysis report

Static analysis result for SHA-256 180112bd9d818db6…

MALICIOUS

PDF

258.4 KB Created: 2021-06-29 07:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d248af2a53d2a88ea8dbaa4bd97636d3 SHA-1: e06ee46a901cadff9ce079f8d8e379462dac7847 SHA-256: 180112bd9d818db60a88cef62202f92843c34e4be37a03da64f7a94b620c73ea
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The heuristics reveal it contains external URIs and points to compromised WordPress upload storage, suggesting it's part of a phishing campaign. The document body is heavily obfuscated, but the presence of embedded URLs and the nature of the heuristics strongly suggest the file is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9766

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://laborke.ru/uplcv?utm_term=cheating+wife+caught+texting+at+baseball+game
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072444de8e1b---darade.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/7a0f9d122c116fb255260ce60611ebd7/ruxebutidi.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/49b65caab9ac61003b3bf95625523bd0/noziga.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fe0c0043e---24708090461.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84fb8bed36---45890375938.pdf
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/kalogule.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16086490c31c2a---1649517677.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160797f839c78b---bufuz.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c501907c427---sapidepofadozazi.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff97038049---gamukazosaroz.pdf
    • http://vhshf.de/File/pipufakigaze.pdf
    • http://absolutelyneon.com/userfiles/file/kutiperakozunog.pdf
    • https://egca.fr/userfiles/file/22840399027.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9fb313bbd---vexaleku.pdf
    • https://jurad.eu/files/file/23261755217.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/3g1nmfvg62pf32bg031ffhejer/3098124845.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/69843183708.pdf
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607211a8b51ad---mimage.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f311396e2---zojusoduxoberazolesanoj.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/o4gnu3jqqaqnjl03naoa78v38k/suziwimiko.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ae940d8ee0d---kigudaweja.pdf
    • http://aire-limpio.com/img/editor/file/xuvowomogufuxodefibe.pdf
    • http://yongqingtech.com/d/files/94202765653.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aca7e0deb3---24264205785.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1608f87611b244---wijimifodubosigusivo.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16089bec013deb---notijaxubuvapagunepad.pdf
    • http://aldara-latinoamerica.com/userfiles/file/14578391356.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000399de.bin
acc79a4e969017e5bec0d7ef860c9d51ba7bae6eac5401e0476c0a85f075aea2
pdf-font-stream PDF embedded font (sfnt) at offset 0x399DE 17960 bytes
font_01_sfnt_off0003c91a.bin
4f7a2276cfdeebbd6ec0116e4403318bf354d06d41eaf0d2d9af1eab2a10859c
pdf-font-stream PDF embedded font (sfnt) at offset 0x3C91A 11020 bytes
font_02_sfnt_off0003e2b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3E2B2 16792 bytes