Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2fe6d404aa22e6…

MALICIOUS

PDF

85.9 KB Created: 2021-09-22 20:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0319ce12bdf40eb665a073c379fbc874 SHA-1: 5aa9dfd3e4c303755a13e21ed4f57f7479605b54 SHA-256: ae2fe6d404aa22e694d0aa99a3932393dae991858bf86e2522db1a518c02e417
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 high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its true purpose but reinforcing the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://sun-green.be/ckfinder/userfiles/files/35858651299.pdf In PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c4369cdad---7869051904.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/kosafutepemojujewaxe.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/gosiko.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/kabujejeronaxa.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/zokasobubezab.pdfIn PDF document text
    • http://telangana99.com/userfiles/file/57117556926.pdfIn PDF document text
    • http://kastely-vacduka.hu/fileok/file/62904058518.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161432f85ea7f4---5132209851.pdfIn PDF document text
    • http://full814.com/upload/files/94700273734.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/zanezo.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/zavofunozeditopij.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/lezojexizimozoxof.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/15educ1u5thl8q47e0avbmd6qo/82142314758.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/tokpv2k4suuftg4qf8oanahsd3/gizemotivunebalemijonufa.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/fc44e25159ecc2d8bf77c0a104c4c9ee/408167348.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/25572897267.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62820568833.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/70662749556.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/95022976481.pdfIn PDF document text
    • http://newo.ru/files/files/defoloritutubesisipavibip.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/93243285119.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/waladedujidapupamavinev.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139222f434ed---57059587180.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/29665371483.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/14365820653.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=instagram+search+engine+without+accountPDF 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_off0000eb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10344 17784 bytes
SHA-256: 3b7d9908fe122d3cde08c624f9a2fab2462205fe3fe5b8d1ae37c2dbb211e9cf
font_02_sfnt_off000130de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DE 10768 bytes
SHA-256: 295dc581d2c266488a562cf018b22895c4e7913f61ad1a6c56941c3f0a643095

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