Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac7b720c5c95a88…

MALICIOUS

PDF

83.2 KB Created: 2021-09-06 09:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9a46f893427ef03ad1387124402fc56f SHA-1: 324c37f6028d92b253ff69ce75102b2a7322537e SHA-256: 1ac7b720c5c95a88c78c9c8b28c01ca8d73ebf1cea1300e56893bc4ed4e6ce14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The `wkhtmltopdf` authoring application and the nature of the URLs suggest a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://sevvalturizm.com/rsm/files/kifimifowefuten.pdf In PDF document text
    • http://driver-jazda.pl/upload/file/61924923471.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098646ebab57---zojegimizuzaperufefedo.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/d1257f9067acddd704377d3b90a0d354/rakefurivosowap.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/tomeluvunamizajexawe.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210807124734.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/modijizizo.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca332315c4---sitakozofubalafot.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/24897936067.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/50bd4b49745241160fe6eac1d78d60f6/kuxaje.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160774bfa4b1ba---15741352153.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/jimagaji.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/v496lu9inbhss8agqrq4r9om91/56272747959.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/jlfekciu3nhhu5en4af29um5f1/26600666202.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/029c315f08a491eef7ab38ac1dc66eb3/71516039926.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e445686e87e6906d210a866ce3f684fe/pugepamabodinilenajawi.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/tozosoz.pdfIn PDF document text
    • http://apcmagon.com/userfiles/xuwajuson.pdfIn PDF document text
    • http://huabulaw.com/uploadpic/2021-9/file/2021090104214173499.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/rafilonovexodomig.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/paluv.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/rm6lok4veot8e8ulbq8nklm2o9/43887450241.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/pavezeruketebepofofiteg.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/nuribefudewetove.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/7977a328b31a2bcd946588e3df5d6112/viganapemokadedujedefuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+art+of+color+itten+pdf+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 17308 bytes
SHA-256: 482e920a13b8ccae7eaf353d8a8d6da32521a4a07b0e7dffda6151209766ccf5
font_01_sfnt_off00010e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6D 10596 bytes
SHA-256: 4c62dee0aa9b032678f497e043dd442d40d66862bae348a1460268839479f1fd
font_02_sfnt_off0001269b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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