Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d68aa3cd585afaa…

MALICIOUS

PDF

95.3 KB Created: 2021-09-12 15:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1348092a0ea35db41731049bf9800550 SHA-1: 61f14f958f0ed25c76df7a2ea989964d89b687e4 SHA-256: 9d68aa3cd585afaac68bca536db569eb2c8244687e1d2fe93b6c01c607337db5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to various domains, some of which appear to be compromised CMS uploads or disposable hosting. The document body is heavily obfuscated, preventing analysis of its direct content, but the overall structure and URL distribution strongly suggest a phishing or malware distribution scheme.

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
  • 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 http://speckletrack.com/update/editor/file/tisozagimabod.pdf In PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/49872287613.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/1d1a141173defbf13696e0db0e9e0f0a/71296989690.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/palamitiposagupovege.pdfIn PDF document text
    • http://euro-ex.com/images/blog/file/jivexujinuno.pdfIn PDF document text
    • http://turinimoti.com/assets/userfiles/file/39648948446.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/21039555941.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16132ec17a78ea---95698345043.pdfIn PDF document text
    • https://phm.vn/upload/files/bapegof.pdfIn PDF document text
    • http://damosushipleasanthill.com/uploads/files/19948582796.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/tapovezawozapepigis.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/57105977554.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/51405498334.pdfIn PDF document text
    • http://www.og2c.com/images/file/kudinazikobakiw.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/fozifojuduvogibuvimopot.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/xirukazexirulawi.pdfIn PDF document text
    • https://tomas-music.com/contents/files/noxobuzijogidevamelew.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/nagipafowululole.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/wixoxeleleruxivisetorusi.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/sowudofuledeb.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/zomiforulavelefuvito.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/30884201872.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613705215b424---peguda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+hound+of+the+baskervilles+test+pdfPDF 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_off00010f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F75 18204 bytes
SHA-256: 550e45408aa01bd5fcde5803f5d0c1efffaeccd64dd674cd96b066fbb5e7d9a8
font_01_sfnt_off00013ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000156bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156BB 10956 bytes
SHA-256: bd94061202b4bf8c0e670b4d581141d2c8f60ff2994d2383330b9028f1f4229d

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