Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7ccfe199bf904a…

MALICIOUS

PDF

86.1 KB Created: 2021-09-16 04:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e97834873a4f01aa2f6eb381dda165f5 SHA-1: 8dc6abccdb5de23eb424ef6ca978c8a287688191 SHA-256: 0f7ccfe199bf904a3e0090c4fa9390e7cdaf6fe6277643ace17ef117bd613cb5
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the redirection of users to malicious sites via the embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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://jbdclothiers.net/emailer/userfiles/file/80267308322.pdf In PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/74563467609.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/61708652574.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/iunaa46b0gtim5babn1auhrfr5/76786113250.pdfIn PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/lowexilemexowiler.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/59913447699.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/33324362414.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/36541021993.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/64539151485.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/25497412095.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/22627484447.pdfIn PDF document text
    • http://fastcredit.ge/userfiles/file/jatezuwuvaxikinafu.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/19593589031.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/dirodajotusasemubojiketef.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/63798969508.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/20404010402.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/96085873255.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/tirinuxavovuk.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/50827339803.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/13428882028.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/6113617088.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16133184018f1c---vudukavonorolumumubudoni.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/vosutojorudake.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/39597729962.pdfIn PDF document text
    • http://3sdent.com/upload/files/72806280186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+root+appsPDF 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_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 9948 bytes
SHA-256: 8162d71dfccf5f3455661bced4225047c619eb4d4e6240f084fb889b82126214
font_01_sfnt_off0001064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5F 17228 bytes
SHA-256: b5ed81629c104448448ec839304ca67dd6ed7532de2cb33115841a2bf89e6953