Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d7bb5dc5637b21…

MALICIOUS

PDF

80.0 KB Created: 2021-08-01 21:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 85b25bd7d8549ef387950d8d3d7453c5 SHA-1: b290fd0873865488746a8571596b473a8e631f4f SHA-256: 83d7bb5dc5637b2136fc30b4ca9b88eaed080d7ec81901b6ea911e573e49a3e4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic findings strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6426

Heuristics 5

  • 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
  • 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://allytemp.ru/uplcv?utm_term=the+summer+i+turned+pretty+full+book+online PDF link annotation
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/da72b0lmbphah6c47j3lma5h21/70135227296.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16084afe1cb2bc---zixewogiwosiwenatulogo.pdfIn PDF document text
    • http://beliangka.com/contents//files/31184795304.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160740c7b028b7---pabewira.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d0490e6bc---kasodojuzanavezodeme.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/239ba48eaa56714f9e1dd81ddec1faa8/4387038681.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1mmemqij6m2es01r8vtqhhtca6/86030896528.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b37a14cafb---vufem.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ec98cf4b2d3---bosejodezepulad.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/62764794668.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/ec361a56c1fd745a866aca4c8386d517/nitikotulowupagaw.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/gafibusudirani.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/60d01aa0e92a87886306380418ba7584/pudopolidijozemate.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/obtm3o1cnnp85m4allj5dg51j3/buragube.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/37787193064.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8bfccaa0d---vegifalifiwaxinogamawune.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021061015354770554.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160953afe19445---rekepebafozipez.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/5546a40efe97c4f1ecef016975dc7625/87410981471.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/1024255b478a393f8f738506552b6fa7/26911738060.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/nuvopuv.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607770c1de6e8---75578449136.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/fd96971a9d7c06d4542f1019a726acec/83892906368.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/jewelurotuti.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/patexadutuvela.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 11012 bytes
SHA-256: 2f2afecf2681d7edfdf5b33a0ca65ded5d42b0b35171e4abc773d2a21c43195e
font_01_sfnt_off0001250e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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