Malicious PDF — malware analysis report

Static analysis result for SHA-256 9459471e3e3169e6…

MALICIOUS

PDF

81.9 KB Created: 2021-09-17 18:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fdc84a6de9d043ea366dce3b0e47e1e8 SHA-1: e59f47e433bb3874fcbbf762ce511feb94e7a03b SHA-256: 9459471e3e3169e61335118993fa8b83d5ccf4814eb7d854e84afbdb5a0c0a01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple external URLs hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links indicates a redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://foulardfotografando.it/file/lapaburunamixamuzokofuwa.pdf
    • http://smsgurugram.com/miet/assets/files/49752801659.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/3f94475b7966dca4197cadca364b3784/67153785574.pdf
    • http://lovesenergy.nl/file/42067185767.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/c7ecbfea05f39ae2d2cbe2dcb3550272/fikodekumarijununudeze.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138aa8d70bf4---94007056187.pdf
    • http://hichipper.com/hichipper/uploadfile/file/2021090210024973499.pdf
    • http://embody.box8websites.com/ckfinder/userfiles/files/11987937208.pdf
    • http://giaexploring.it/userfiles/files/katogegowipoxiduz.pdf
    • http://isagenixmakessense.com/ckfinder/userfiles/files/dipenelex.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614151f1d4631---45082919639.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130eb13dbfbf---mojerelunodamekawikidu.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/ae224ec4b489e3533a0c664f890dfebf/16131404263.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c44b2876e---buselaponiv.pdf
    • https://onecre.com/images/content/files/juramadowa.pdf
    • http://daydreamspin.com/userfiles/file/67462519568.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a31fd4749---82098102853.pdf
    • http://musorcentrum.hu/files/article/file/42422348181.pdf
    • http://contua.org/userfiles/file/zubotufetakibaperuvonirez.pdf
    • https://k85shj16h-561lt.com/contents/files/gopofawifaginesi.pdf
    • https://longhoang.vn/upload/files/34784223146.pdf
    • http://ellenia3.eu/userfiles/files/zotuwuli.pdf
    • https://rh-h1tapi-turbo.com/contents/files/rulalajakimebolufizutaror.pdf
    • https://dukeofmarshall.com/ckfinder/userfiles/files/pojaz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=graphic+app+for+ipad
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd12.bin
4427c02c5b7174b52b7a3da77524343a7954236c1253c463c3918caf2a117393
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 17720 bytes
font_01_sfnt_off00010aec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEC 16792 bytes
font_02_sfnt_off00012303.bin
f4f421dd7fc44fed580e2cabb001db8a8d8615b21c93591794fa89366ceac64f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12303 10208 bytes