Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ddc068222bec49…

MALICIOUS

PDF

91.1 KB Created: 2021-07-05 00:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2434555fc698aa4f9615332fe71121b4 SHA-1: e687a90c534d25a7ff65e298581de6d287b1d37d SHA-256: 15ddc068222bec490bffd38b61bc43fdae0a5599abc552ad3d9ea9454473d813
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to external sites, many of which appear to be hosted on compromised CMS uploads or disposable hosting. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://archism.ru/uplcv?utm_term=cross+patonce+meaning
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/sjlgq3erlddmq9vjfqqbb4knen/7454084202.pdf
    • http://marketypik.pl/zdjecia/fck/file/pexolija.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca37a4487f---96805515717.pdf
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/84757312614.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-5/20210505195327913086.pdf
    • https://mimpiindah1.com/contents//files/29838390176.pdf
    • http://luisacortesearchitetto.it/userfiles/files/71162691983.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5fe521b48---vebavijabekivazew.pdf
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/mazowakovasumivalos.pdf
    • http://shannonlakeestates.org/fck_images/file/26312723702.pdf
    • http://pattersonandoliphantfamily.com/clients/875492/File/25981599620.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccaefc7175---10672410914.pdf
    • http://meechoktoolmart.com/user_img/files/gomonofegufobobiwowo.pdf
    • http://pogotowienaukowe.com/Upload/file/zujisabikaxiponeremu.pdf
    • https://werbemittelag.ch/upload/file/tudalixato.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/fc61cd34adf1c7b74c89d5b8bb6c40e2/92613049184.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/4eb26792f80c78b69cfa79be447aa474/tosovuwax.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/esu9lh8l0mbd5u06o4oo5paqi3/16524854729.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160890e20acde0---fenedolojexabivu.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/9a96ce68bc3a9567e9f480b7dc192dd4/rixixeburu.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_off000100c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 16792 bytes
font_01_sfnt_off000118da.bin
2a0cf605421809f03b85e6642a7c6bc503e56f361022fcea0e5c7cfe763a4f33
pdf-font-stream PDF embedded font (sfnt) at offset 0x118DA 10700 bytes
font_02_sfnt_off00013173.bin
3780c0269dc0abfdc79eed4bf21ba4d994819a6e9eea040ce71cb3e7749cdbb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13173 17924 bytes