Malicious PDF — malware analysis report

Static analysis result for SHA-256 00df7aca1036a06a…

MALICIOUS

PDF

83.1 KB Created: 2021-09-03 10:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d75e8e2b315bc3c4c4de4d8881e91506 SHA-1: ad47f251ad080b7a568bdd968260f8364841747c SHA-256: 00df7aca1036a06a1eaeb2de93637560295874686393e029133c58839980d4f1
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links are likely intended to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114cac1e8728---deliwawekuka.pdf In PDF document text
    • http://joltiy.ru/uploads/files/bologuduwutaravurilobofo.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16125be3718cc2---97012930343.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/3891799864.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf7c76ced8---masugewitosa.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/3815f472f89a6d0ee7a6aae307925721/gexugosuxapebe.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/rudesiwodurisatugadakuf.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb566382fd---62650983456.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/esada.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d410d78304---kazatuvesoduloxuf.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608509c6d12d7---22814721934.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/74689943932.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/53617202521.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114643cf3629---patetuxebudapukil.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/zojalewor.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/gciiv8t5n3fibd4n4cu7dn65v2/bagoxituwepewatusal.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/dupikaxabobobafufovaki.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/fizovutuzine.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/fupamiditubowililetubi.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/papekunelidevipij.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/33317721222.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b8eec8662---kejegojigilumifad.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/73233323279.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/vipapupu.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ca5cb5effb3aac9c3094645fda72da91/kamanidonum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=radiochemistry+and+nuclear+methods+of+analysis+pdfPDF 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_off0000df4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF766 11144 bytes
SHA-256: 5e7dc23f4a2d57e95eeb2b46ad9f34def7feb684746c60625c82b752b1338ee9
font_02_sfnt_off0001113f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113F 17148 bytes
SHA-256: 4d1f781f44cac027ae758245dad3ec3da4fc6c9a808c5a134503cea781361cfa