Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65563b0caf51866…

MALICIOUS

PDF

86.9 KB Created: 2021-08-18 15:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ff752aac56a6ca95adb937d18c426dc SHA-1: 2d2a67f9d2d9bd4541c68cdd8f58ca61da77a988 SHA-256: d65563b0caf51866f90b3bdf69107e191a84f24e425b18234103c04a4b27f43e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to direct users to malicious content. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=how+to+set+up+apple+carplay+in+mazda+cx+5+2021
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/98kc16strbg39pabbs3locg052/77904039822.pdf
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zusevofa.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/1f8e6a618f063be115b3879c5bf99c24/xemazawamilugokiji.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/vfroi9n7s8apa8dhf3b74qoue3/59391778839.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47051a6f9a---kikekijemaxofu.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/3tgn5ae87lgmpsht4nkkg4mnu7/24902103823.pdf
    • http://bighost.vn/uploads/userfiles/file/93485374342.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/2fcf309c6f4ed3416f3d3e5a0536248e/38346121837.pdf
    • http://spamsmsgiare.com/media/ftp/file/3133923879.pdf
    • http://partnerplus30.ru/images/fornews/files/86230946085.pdf
    • https://jamuiboe.com/webroot/upload_media/witaju.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/fd47034cc90d9754beffe1104743fb26/tumeposipujorozo.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7adfd8f722---51578204256.pdf
    • http://diysmart.net/userfiles/file/palijusoku.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/bc77a527f8405d7e1500efa182e5671d/55633998497.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16085d6b98f56a---43120607301.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/a3625bf3d3f5f2567d7c0db5e3d8a92c/pepasiwitezotujer.pdf
    • http://artkulinaria.pl/sites/default/files/file/14699781154.pdf
    • https://camgloberealtor.com/userfiles/file/tivelej.pdf
    • http://ottotech.center/userfiles/file/bawajux.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/64ijj7a6u4mejkf8uvbnd0hlme/bevagopebumuwipu.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/7983636cdc702288b9b50591579a4b58/jexolitugotas.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/k2bhapupr16kh06umh0486alco/gudutulajanezugef.pdf
    • 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_off0000df8d.bin
da2cd4e213928d5d19c874cfe2ccc5355b001bb24c68544477b31f8a1362bdec
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8D 11556 bytes
font_01_sfnt_off0000fb2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2F 16792 bytes
font_02_sfnt_off00011341.bin
b2985a991ab3e9ce5c119edc44af1bfec655c400f9b8cb665281826a73ad38a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11341 22560 bytes