Malicious PDF — malware analysis report

Static analysis result for SHA-256 10986d20b86104d1…

MALICIOUS

PDF

99.9 KB Created: 2021-09-08 06:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 963cbd8a991736b62f6b5bc5e9b21418 SHA-1: 62e0e4fc7c97771454d7ab53db24ab8fe17a1899 SHA-256: 10986d20b86104d102e25078ea77a9c65a2533564a41b95bac5673bb57e39bcf
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://rocincorporated.com/domain.com/images/dynamic_pages/file/dekazovafotogipowejojesik.pdf In PDF document text
    • http://gccde.com/downloads/blog/geust/files/bifujogugufizojoloramo.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/fexolomufilujawonepas.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/0i90aj4lf26t0o762ovc65ahuu/jigamizetizekupud.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/63d8e3fb53fb1c8ad7dd0b19fd579b80/xasexegokuwogixif.pdfIn PDF document text
    • https://posh.hr/files/zukafaxo.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/rutikuvakaxafawimugekatu.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/3670611346.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/pilipugusakuworijetosejo.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/33aa0bbb2c6902978db482d2496ae03d/37436156090.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/rurapakiruxutixulifef.pdfIn PDF document text
    • http://adgroup.co/userfiles/file/takazofeli.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/d76b8b7219411c624ffd4347fb46d947/jilonuru.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d83431f4f4---75273449389.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee319533124---mirozagoretum.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/patazufipe.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072da34cd519---22003580250.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/6394297265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=truy%E1%BB%87n+sherlock+holmes+to%C3%A0n+t%E1%BA%ADp+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A4 26968 bytes
SHA-256: f18d873aa35e5de09321b7fb8b0e971aa3c553c7f887d625a07a493259cfe8db
font_01_sfnt_off00012967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12967 2268 bytes
SHA-256: f780dca158cb2621aaab82791e50a48a13723040559554b363adb17bf2c22327
font_02_sfnt_off00013371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13371 11524 bytes
SHA-256: 7a5f03c299b6b62e02f9a565f36f74338e9c72e5f0e3359199204a27f55c030d
font_03_sfnt_off00014dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000165dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165DC 17312 bytes
SHA-256: 610bf1d8813994b1ffe19e35b0b668be8dc643697b92a3902304e591d4f5fbea

Open this report in the interactive analyzer, or submit your own file for analysis.