Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d249af74616a17…

MALICIOUS

PDF

83.4 KB Created: 2021-09-13 09:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e13dd83d281e8553e332ca3ee5503bf SHA-1: 0e5892965927805bd72b5b9b0b19ca2f8c65de68 SHA-256: 06d249af74616a17e822fcea3faeb09ad987035c288e1bb2a23778d80d4d5b14
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://jiuxingchaoshi.com/uploads/file/090419202985.pdf
    • http://soc-in.com/data/media/files/fetilonisivorubiwezelurem.pdf
    • https://nulifeus.com/~nulife/userfiles/file/patewobifeta.pdf
    • http://kidsjeodo.com/images/files/luguwebu.pdf
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/zigebomaxobuviwowi.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/4e02de79f8d4dc3b9b4a791958fb34b4/givaxojipilo.pdf
    • https://pergamine.com/ckfinder/userfiles/files/kisaxalawud.pdf
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/14728102899.pdf
    • https://sassanoproperties.com/FCKeditor/file/64506410214.pdf
    • http://phanvienphianam.com/uploads/userfiles/file/6128376117.pdf
    • http://abogadosaguilar.com/ckfinder/userfiles/files/solowevutorajawufisure.pdf
    • http://nissanotogovap.vn/uploads/images/files/46588038816.pdf
    • https://jjcfurnituremaker.com/userfiles/files/dekezesajowesigasupop.pdf
    • https://ozora.schaffsen.com/contents/file/nasapesi.pdf
    • https://fratellifurloni.it/file/xamizinafux.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/kebuwevijobodubesesenazor.pdf
    • http://abwjefferson.com/uploads/files/18144278146.pdf
    • http://distant-property.ru/fck_editor_files/files/76797076234.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6kbfm89gfrrr252flu5t78r607/68898400884.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed83415b5b---gixovekamanixakonosaxira.pdf
    • https://hygradeinsulators.com/images/uploads/file/18075901442.pdf
    • http://gerd-pollak.de/userfiles/file/rokejolunuxixali.pdf
    • https://dakhoathienhoa.net/images/files/55378227694.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133437248371---fifogifuriwon.pdf
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/peromozazojur.pdf
    • http://email-database.info/userfiles/file/govesugofifujiva.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=fast+%26+furious+9+movie+torrent
    • 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_off0000e1ac.bin
2b761165fb8d816218b64f1654e27de82dc47286d8374edb4b21344df461a980
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 19296 bytes
font_01_sfnt_off000113ad.bin
f51d5d1ed6f87b52d1b9f429dd51402bf3eddb0f0727a485d5a13d2cfa109c79
pdf-font-stream PDF embedded font (sfnt) at offset 0x113AD 9476 bytes
font_02_sfnt_off00012810.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12810 16792 bytes