Malicious PDF — malware analysis report

Static analysis result for SHA-256 447d7aaeaa7101f5…

MALICIOUS

PDF

76.1 KB Created: 2021-10-05 05:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 283204b83cebf76e6e5537b5f9110f6c SHA-1: 9a17459c37aadd9ce827aee2a37ecffd959b16dc SHA-256: 447d7aaeaa7101f50a4351c8775470208cdba20ba1af35b882668f6bafe7af06
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://oniceh.ru/uplcv?utm_term=lilly+sabri+guide PDF link annotation
    • https://merlak.ru/userfiles/file/90513532764.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/vevovojawikijejigu.pdfIn PDF document text
    • https://clubon.top/uploads/files/rusugen.pdfIn PDF document text
    • https://aneri12.eu/res/file/61627254019.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/23607054935.pdfIn PDF document text
    • https://abss.pt/userfiles/file/21998964432.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/66882050634.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/gafemefesujigawukefonare.pdfIn PDF document text
    • https://themalc.org/files/file/78291382084.pdfIn PDF document text
    • https://hotelharmika.com/assets/userfiles/files/zofitigapo.pdfIn PDF document text
    • https://deepex.hu/hirek/files/bopotufinitematutigebenip.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109031627184490.pdfIn PDF document text
    • http://sb555.com/photo/file/solikuwofaxesibepawawo.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/lomupavakufeviwamuvi.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/xegurogitaxin.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161344f108acad---20138234405.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/36231740770.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/27674853369.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/27896227135.pdfIn PDF document text
    • https://granitnet.hu/editor_up/64174365167.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2021100508275375.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/tidupidavexuleribi.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/50802271870.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/86826232697.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/63474923465.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_off0000c41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41C 10412 bytes
SHA-256: e313a066f67ffce3d2af1d40ab77501224c7a19660d6bed847d2491bb008bfb1
font_01_sfnt_off0000db8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8F 18004 bytes
SHA-256: 2df2b7a8172b63e2d9abfa940fc632759aba548be0c8f324dd887782bb3545aa
font_02_sfnt_off00010abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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