Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07b0a8890a8a5a1…

MALICIOUS

PDF

81.9 KB Created: 2021-09-11 04:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8acc41c9feab77de986941397dea8345 SHA-1: e675eecdef4775cf5b0cec12b8fd8f38f12899cd SHA-256: f07b0a8890a8a5a1239d3a980c6b1e7990cdbc494d71b45bb607778e2bf2881c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The embedded JavaScript and the link farm nature of the URLs suggest the document is intended to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://philabc.ru/uplcv?utm_term=dry+mouth+and+dizziness PDF link annotation
    • http://redactron.com/userfiles/file/37154398622.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/91228387005.pdfIn PDF document text
    • https://tsolisp.com/files/file/80598161736.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/jodisarifidox.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/53433213831.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210901_B86F7EA67CA8698A.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d7067ea7f---mitaxujanigapikipixave.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/xoxemutawituxilazi.pdfIn PDF document text
    • http://slovoveri.org/userfiles/36809156352.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/sopewunajitokivoxe.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/13645634230.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tjo5kf6ajniieija9bc2m2mpc4/47225651979.pdfIn PDF document text
    • https://calprin.com/ckfinder/userfiles/files/38405661754.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/37269893619.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/kuzekobake.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/mamakexinofuzumegoki.pdfIn PDF document text
    • http://coniperfumes.cl/js/ckfinder/userfiles/files/65523879526.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/73612198578.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/22408115817.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/pasasavozafarusape.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/84087735968.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/39219225614.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_off0000dc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC44 17484 bytes
SHA-256: 34bf6ba03f01c0515f4e11b3b4bc174b0378ef78c3e4ba1b64d8c10c1652a185
font_01_sfnt_off00010978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10978 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001218f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218F 10740 bytes
SHA-256: 4397e7091bb1dfa5a5571f9ee6614fcd4e406d2483ba364491496bd2d369ee07

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