Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b3149182f46f8d…

MALICIOUS

PDF

89.2 KB Created: 2021-09-06 23:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4adfb2ee9600f577883aa5a1666d13e9 SHA-1: b3d9ee912ce98841e38586d78ef0aaeb3e1e51b1 SHA-256: 65b3149182f46f8d834c99f52df13443cdcf971dd766caab5308278995d704da
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution lure. The presence of numerous external URIs, many hosted on disposable domains or compromised CMS uploads, reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://huntic.ru/uplcv?utm_term=fibrilacion+auricular+cronica+pdf PDF link annotation
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae7929b5f1---nusivedapekasunenowerove.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/81732157902.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d22f2cb369---30431186649.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/tipilumolomodepiga.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/65040583525.pdfIn PDF document text
    • http://artospace.com/pics/file/85326347482.pdfIn PDF document text
    • http://berbun.com/user_img/file/rulasu.pdfIn PDF document text
    • https://proia.bg/userfiles/file/salokov.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/merelutasimefitab.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/97131545909.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608742a91f6f1---pinudusekidow.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d7e9e17db944707cf931f084c6e0782/latoxefugupuvoliwazixolot.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/0edbb759ce6fc3c47153055fa8f8c3e9/62020313611.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/373b97c276b58b6bb3aeb569bbb686c3/gojimutixawiki.pdfIn PDF document text
    • http://89928386.com/uploads//files/202108071241509585.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f6442220502---fegatomuzuxivu.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/f98809244c2d540b808e180c244c65fc/zojonizesigiruwadiwesetew.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/kivkmsijq154lk8nmg0igie9v1/meleseti.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a71c359fc67---rudevulilozazilu.pdfIn PDF document text
    • http://mahlkoenig.nl/app/webroot/files/userfiles/files/pezebiramab.pdfIn PDF document text
    • http://webhenevents.com/clients/868374/File/92377655452.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/55525fe634d2632605b04830822005fe/14563257418.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/tonogagexumirumodado.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16087384389a7a---66878013398.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/depidilarozuko.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_off0000f827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF827 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11039 18280 bytes
SHA-256: 119731c4d3e62c73cae20028e891656b9ff27209ad73c89f0adfd35ca8418251
font_02_sfnt_off00013f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F95 10432 bytes
SHA-256: b0c0aa75a6912ff0b6f49ae90ca4ac33067125ee4ac5b218203561c64e7ff58f

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