Malicious PDF — malware analysis report

Static analysis result for SHA-256 5774b199fa358cb3…

MALICIOUS

PDF

91.9 KB Created: 2021-06-27 22:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1ba3e3a50bf360d992bdcbcb7d375ec8 SHA-1: 582453ecb676d30c731e782edfc1af999936d3b6 SHA-256: 5774b199fa358cb3ed905eeff2f8a93a45ea38e8fc643f8f62f335f33ebe1ee8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised CMS upload directories. The primary intent appears to be directing users to potentially malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://pypconsultores.mx/userfiles/file/11374108725.pdf In PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9b4f9a8bb---jirexox.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf2a133d68---72724780824.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/nisebomap.pdfIn PDF document text
    • https://plasy.com/uploads/file/54179070645.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/52126385995.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/3556659178.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7a096269d---72467851231.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/94365358599.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/dizakanimetaj.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16072cdb2badfa---83708703010.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861d006834a---87492798943.pdfIn PDF document text
    • http://haki.vn/uploads/files/mejejonozol.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/68fa3ac36543044477828eac7ef86c20/zosagetelone.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/d5a5sai4btq673k6qhpn4a0j27/jorubafudajuvoxojazevise.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c214a44cd86---disimirolajirafojumuz.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/zanixo.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/30297440145.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd77f4965b---digugadedujivewima.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/fdec87410d160677a21538fa1909e4ea/43805930827.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/n5vr08kqoj4fid08av93um3ee4/jumekakenorige.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c07bc18ee---wetipelewidubikefiziw.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/fibupomukupo.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bae8723259---puwolusejibuvilin.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/npgd0k8nqlu32sdbls3911vkl0/89213317395.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=co+online+sports+bettingPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010288.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10288 16972 bytes
SHA-256: b12e3c1050779269d6157c0cec27b0362aeb32b2367620f439e242b7fce64ba5
font_00_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 17908 bytes
SHA-256: 6248039c75b59e8c8b2f2d53a6d17b0d56c3ec8d144c57a4f3241dc5970919e8
font_03_sfnt_off00014a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A2C 10436 bytes
SHA-256: 959338fe55cf016c620ef815fc89616f539d6e61077c4ba1016cf340a68196e7