Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cc83eeaad6134a…

MALICIOUS

PDF

94.3 KB Created: 2021-07-17 22:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2eed8a14642b65583b328324c8be7f7f SHA-1: c19f54c11fb2c13f7eaa2d7449598a90cfd5da2a SHA-256: a1cc83eeaad6134a27fd1bc1b0e24bc073262bdb5b8ecef0a0fe616bb66bd1de
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://permanentnimakeup-brno.cz/userfiles/files/takugajebuvememagoj.pdf In PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb89afecf91---12990078203.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/19948676495.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160af038f2fafe---50001864038.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d528ab85c---31626595111.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56d4cd9d3c---15001618120.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/jisafavijumefebelawadenez.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/1393556702.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/9851727598.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/b36a53ceadd6c9466423ffdee8e53fc0/lugajis.pdfIn PDF document text
    • http://614move.com/clients/4890/File/nulowonikipewubotimegumo.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16094ca54b00cf---sulijotabowemukedubazez.pdfIn PDF document text
    • http://poiskvod.ru/images/file/67936500800.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b43c8f61f---xujejov.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/binubevagalir.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c28e76be---77461366690.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/20184860057.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/j8rhim33soa62cp19kd4j85jo5/44880727045.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/da8972c454a7d7934ce37c52719ea9ad/88782409695.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fea2265a0---38605153975.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/52c52cd3f2cbf7e6cda50123d405904e/5956641319.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=stipulation+of+factsPDF 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_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 16884 bytes
SHA-256: b7840a4ef56554cc453f1299bcfda50561ba61843c2d7cba8cc9ebd4ef85c506
font_01_sfnt_off00013ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCB 10416 bytes
SHA-256: d4df64fdf3f4bc2fa0c3b84d6b9164fc3f5e3627b20f8f409c4efb5cd3a7e407
font_02_sfnt_off00015481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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