Malicious PDF — malware analysis report

Static analysis result for SHA-256 354e01cea0d4a1a4…

MALICIOUS

PDF

96.4 KB Created: 2021-08-09 18:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9bd8cd0f6175a0c763d7bb5dd725f4e0 SHA-1: aca0b0e4f9feea4089400e56a000b9ef1b1f367e SHA-256: 354e01cea0d4a1a4e8606e23a5cecd137c76bfe425914268b8c507a22318ad66
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or exploit kits. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://togeltop.net/contents//files/wovalofesax.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/da42bcb705548adbbae4c94b34670509/32405099192.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c07d3a52a35---41798404059.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/pghtdvnsd9ntlatr6g3fb2vlom/xanuvatilun.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ed968c932e7---34860930230.pdf
    • http://jadever.vn/Images_upload/files/zomozaviwopuko.pdf
    • http://castanienfamily.com/clients/74558/File/welaxovalipuberagolawa.pdf
    • https://cmsschoolkg.org/userfiles/file/55936837811.pdf
    • http://trunglam.vn/uploads/userfiles/file/15833497596.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/737ca39581d4fb116f4e691465f1ea31/toxomu.pdf
    • http://www.rify.us/cms-uploads/files/fefamamip.pdf
    • http://files.ibiza-ferien.de/file/97375872773.pdf
    • http://gldbirdgel.com/user_img/files/raromafoseb.pdf
    • https://biroestarsa.hu/uploads/file/93605164386.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610341403d545---76469348845.pdf
    • http://ehoron21.mn/uploads/files/59984908896.pdf
    • https://hondamienbac.vn/userfiles/file/15296385822.pdf
    • http://marketherballize.com/ckfinder/userfiles/files/kaxipugexamuzeroxe.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62429151d---54203159969.pdf
    • https://soechi.net/userfiles/file/76057312487.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/97741773540.pdf
    • http://adveotec.com/img/file/ruwenerizelujep.pdf
    • https://werbemittelag.chupload/file/20819982382.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=is+the+black+bean+crunchwrap+healthy
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdfd.bin
f3b5734567cf344b1f22e4ab7003efb115e59951066c7323d094b0e7e9013a6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFD 17944 bytes
font_01_sfnt_off00012cf6.bin
0b5a7bd52e70ec7a1d45ecf184793c7dbe1409d62e4ba52b5c2535312744c580
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF6 10744 bytes
font_02_sfnt_off00014588.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14588 16792 bytes
font_03_sfnt_off00015d99.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D99 16164 bytes