Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bbd3df1155665c…

MALICIOUS

PDF

78.0 KB Created: 2021-08-16 20:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 68963a86586958893e113e97f124b58a SHA-1: c2fe4b0b29369fb7f1c83b71ed90c91ced6b9e48 SHA-256: 47bbd3df1155665c272752225d0a37c86464ebe5c797a91ce7d4064602d37f22
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://trevorhannant.com/33596761835.pdf In PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609422960913a---kojojakemegunutuze.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/51100980121.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents//files/87362253663.pdfIn PDF document text
    • http://ihdbd.org/upload/files/dajopilavesabulenunow.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-6/20210606203019540341.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2f3c691e4---8444872797.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/bdgrv5ssgg3qmfk4mgjfetcilq/13183138077.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/0f5dfe1aa2bce53e90e752341fbbd2da/4411108437.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/23959256335.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b74b9a82220---51346641956.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/4e095ed717d75281279654b92f9513c4/raxetizenalemoxazefenafax.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/68680246503.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/ttga8ttnoa9aguu2aq8cm9rgvl/bupumadazojavixekupib.pdfIn PDF document text
    • https://kimcert.org/E/file/surixituvizif.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f81220085c---xuvuka.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/xajaguwuwu.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/291418375459.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/jerujepuxufagesivowera.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/segapiriwedukusota.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/819b5c3972eeacdf40414f44fa63650c/volaji.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/jevodidexerenina.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/86544034875.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/nejibetutizabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=research+methods+for+business+students+7th+edition+test+bankPDF 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_off0000cb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB69 16736 bytes
SHA-256: b9708a4c9ab0f3567c7f2939e1eacc1cfee8c385c2b315911e783ae19caf1530
font_01_sfnt_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 11124 bytes
SHA-256: dcee3e9d59a6ca0d10898c41ae96e8cb04b597ee107351fad8f66c63d3994922
font_02_sfnt_off000110ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1