Malicious PDF — malware analysis report

Static analysis result for SHA-256 7906ac37228f4197…

MALICIOUS

PDF

73.8 KB Created: 2021-09-01 16:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: be1f2dec0665eaeb21f76e5d7a3656ba SHA-1: a176a46934a9f2afde619c913a2c00874d78f4f3 SHA-256: 7906ac37228f4197ff3a30a90fa58950e46387a8f290869390455d77f2417cdf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the link farm structure are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://laborke.ru/uplcv?utm_term=it+is+the+east+and+juliet+is+the+sun PDF link annotation
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4bad52e6d6358cd4d6def6301f3f8780/kesinatafixixoluruse.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/tufubi.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c924689180---15558258871.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/vixagopivujokabuv.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/kakimarapupejifefozu.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/nesutakirepedubuletas.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a567e0861---43698361469.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/hdcsfpcoi6jed8ljt6gjl702aq/65070191822.pdfIn PDF document text
    • http://rc-modeller.se/images/file///xapepabu.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/2477872878.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b51c494e4---36485681669.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/4bnr98ndtalghovjrevire996a/lewetaf.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/34426639700.pdfIn PDF document text
    • https://cristalensi.com/public/File/jurojil.pdfIn PDF document text
    • http://foodchemsino.com/d/files/zesuvokopezuzapegitoduko.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/13474379466.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/zonug.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/559edika0habo1q38s98eussh0/pomubinom.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/limolasatal.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/xejemataribebami.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/30be873f6abdb90bc9859b573a18467e/gojisedananovipuk.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/66230612650.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160da2c6ba691d---ganamelusitudizidenakuxin.pdfIn PDF document text
    • http://greece-ex.com/vuwonozanitukufexe.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_off0000bdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D7 17184 bytes
SHA-256: e3ae1297f47e508fc8f957cfe39e3549f827d84bf316154cd106a2fa305f3a5e
font_02_sfnt_off0001016f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016F 10308 bytes
SHA-256: ef8a30dead05a8fd1b7633b847bca20eb6e74398c2f3a58fe056d455bf6ff40a

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