Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d2248b9cf6e7eb…

MALICIOUS

PDF

80.5 KB Created: 2021-09-02 01:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4358b853d17501ea08c202a5f8f1f8b9 SHA-1: 1012f83cb59c45b8bb3e96ade09d96baa4d8ed75 SHA-256: 16d2248b9cf6e7eb6136f7c06f807f4894abb28363596988eac9b79ac73c84de
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to various websites, including those hosted on compromised CMS uploads. This suggests an attempt to redirect users to malicious content or phishing pages, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crysiq.ru/uplcv?utm_term=jurassic+park+3+full+movie+in+tamil+hd+download+isaimini PDF link annotation
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/tojakewiwugopole.pdfIn PDF document text
    • http://indel.sk/userfiles/file/wogijabaf.pdfIn PDF document text
    • https://smilaxlabs.com/userfiles/files/51777159341.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc588ecfe2---55200604404.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072cacceb7b7---rizali.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0e286ba15---37077266720.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/49116757671.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ca41c1f3e3304e3a5591a88b59048c73/wezuxu.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/mibifaterozamilajozuvivu.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/3o6ckblfh9p5pbapvk5c32h822/65169903223.pdfIn PDF document text
    • https://invest.pl/userfiles/file/26416239703.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eb955674d---79259586486.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/32c0de9c76a1e0c1d585029469fbd1aa/22325390258.pdfIn PDF document text
    • https://olterus.com/contents/files/dazipotezut.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/29653472770.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/91251048458.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/28120083492.pdfIn PDF document text
    • http://orem.mn/uploads/files/pebifasoxodexibarifu.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/35981419652.pdfIn PDF document text
    • http://slsnn.ru/content/file/kukeg.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/sazodupagobenox.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tisalotole.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dde2811c67---18886147417.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/11730993176.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160849f69c58d0---lolorogamodolupo.pdfIn PDF document text
    • 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_off0000cb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB78 11392 bytes
SHA-256: d32b2801b8e8ccbb8555fff3d58ed497788bdd197199701664cb28d9628bc453
font_01_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 21024 bytes
SHA-256: 1d99f7767e73a1c7959755b54ca83cc94ebcc76b0d4e3a12a9b6ad123964e6da
font_02_sfnt_off00011bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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