Malicious PDF — malware analysis report

Static analysis result for SHA-256 838bfe82c78c0794…

MALICIOUS

PDF

95.1 KB Created: 2021-09-05 02:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7990ccbbbf15ba368c88d6a2f5d0459c SHA-1: 3072cbb94bdbb814f3bbf50969d6f1f040438531 SHA-256: 838bfe82c78c0794995e804a57b147d69e6134e611ec9d3f6caab602882d43fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple external URLs, many of which point to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to redirect the user to one of the listed malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=the+nine+parts+of+speech+pdf PDF link annotation
    • https://dolmalatrek.com/userfiles/file/29918511153.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/11038565466.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/lebejadupud.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/xorugejefefadu.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6860afcf1---98720811604.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/54465000513.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/br4prba4k33sjrhfr84ul1dahf/28895912552.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/38906832829.pdfIn PDF document text
    • https://activepymes.com/pub/file/33522241569.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/tajedasewofopemutojaju.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/kawuxakenibuwelawu.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e48761957---95273690541.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609056de31617---80917904025.pdfIn PDF document text
    • http://sooclose.eu/upload/File/xesukixorekunibikedugobin.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/vhbrjrp129tubqoce06q3eifvm/mobazijegetarovusi.pdfIn PDF document text
    • https://digireg.lu/upload/pilikukigowem.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099eefe3f92c---wuxexefibulifujeli.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/32511375020.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/zajirufizujox.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/345c35d82f56cc919b360a956e7a1ce2/xeratutapedejebidujavow.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160775fb408d5a---68466627357.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/liweseb.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/56589862566.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/fadofudilumela.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_off00010d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 10636 bytes
SHA-256: f90af025d966b94480fd0073f51a5622ad068830382fa1c0a005779167e86c48
font_01_sfnt_off0001257c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257C 18940 bytes
SHA-256: 58f1e7abee711158897325b6df5e5cfe98afa56e5fb73e8ac0fd5976bb914f5f
font_02_sfnt_off000156a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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