Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ee6d83f9a425f6…

MALICIOUS

PDF

97.6 KB Created: 2021-07-04 16:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0fc0906fb9b3fd09be2ee8e3d79634a SHA-1: fb42deb76931907b59aaedf32179584d3b9a653e SHA-256: 15ee6d83f9a425f6bec2d7ded5e9e5be1540ce2dbc29245f355bcdbc4e4ae2fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress uploads, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/29f71c65161e9708f0a64470e0bd1130/pesibimazofazanetotuwe.pdf
    • https://n-v-v.dk/userfiles/file/xokonumorikumisa.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/b948f778b5853892c17c70d2c4839853/famatixewatunebavimasa.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d90ca657f44---valikas.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/jhfeu4m1vo0d6fkgbkp48292g5/zigig.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97dcb9b3e---tamejerag.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a9f72edf3---43799902696.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/80pus3aknsui8e24hhvrt2907a/vefedofakulevubexiwizidun.pdf
    • http://airholic.com/UpFiles/WebEditorFiles/file/petelefikatexu.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/3280811702.pdf
    • http://tourhong.com/FileData/ckfinder/files/20210619_B10CB7B3D4A2DB9C.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16092dbd5080d5---vesofefixi.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a274015ab---23779399970.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a68c80d1e67---87102125166.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/af98db1d6793e8db6cc2a99c74e0b33a/77416737732.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160731e906ac3d---20018152285.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b664305bb56---67068358530.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/cvr03fmemu2d61q5q8gv4cvn04/kabaranudotomatasatoku.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1607e4e9a---52361233975.pdf
    • http://www.bluewhaleline.com/image/upload/File/86990136540.pdf
    • http://iehyun.com/editorupload/file/xewiledetugesopebaduta.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072ddd607fe8---fixubimabazimixikuxizigom.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a02ab4dbed87fd46b4430f82f69ed2b0/turab.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/1071cb5fd4772c8829fd88cebb189229/tuselixebinutavokitu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=mixed+question+of+law+and+fact
    • 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_off00011875.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11875 16792 bytes
font_01_sfnt_off00013087.bin
8b3d3fe4f5226eb67cf80b305e98bd6ae508abd0c9502d5a27a1359423a8d9b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13087 17664 bytes
font_02_sfnt_off00015e92.bin
9ae235207a4cb1fc3345475ba0da9e3c78084a83255ba282c4dc2e9eef1e9438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E92 10796 bytes

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