Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27e17c86fca0470…

MALICIOUS

PDF

87.2 KB Created: 2021-09-04 00:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3e536192d4bd7502ce65322b23dd1f32 SHA-1: 8ce73fc8b4a8d2f6662c3e8024c8532f057c2ed1 SHA-256: f27e17c86fca04703e9799c7d91b6fab3d122de92ec296468d9fd9b68f99729c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other potentially disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the PDF structure strongly suggest it's used as a lure, likely for phishing or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8dc210ab1---wojavoxegotekivagixa.pdf In PDF document text
    • https://aduanaldelvalle.com/userfiles/file/rarul.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/kipetixegisoruxinorif.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/55583175280.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607911a4abfbf---59062536083.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/17592041669.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b11362a6ad2---63463662158.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f16f6647ed---vizadol.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021060521115373499.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/docsgmgj3lgsh4c5bjjpf4cbku/ganuw.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/73201788762.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/kidix.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113319c15004---pigunelibavugedifililu.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/tizivesojipumunaxiku.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/78657223477.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/13600718347.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/tomuwurugefali.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/jidupusobonipumusi.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5160942ccc---20076019258.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021051305293773499.pdfIn PDF document text
    • http://heureka-cz.eu/files/86795858231.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/kejofegupefape.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/rovixugepoxilobaxasila.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=no+more+stinking+thinking+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_off0000ebd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD0 10804 bytes
SHA-256: e0a2b8c3d303b74bad1c4efba32e724795bd9215b23cbaa73de1115a3ebeb309
font_01_sfnt_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C58 19764 bytes
SHA-256: 2be5a182f95d578bc5a4dc9a5008e3a53c6676d140438e5ab894824e499627c8

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