Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe08da191c5f0f9…

MALICIOUS

PDF

102.5 KB Created: 2021-06-28 00:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b7407301cb01f014a429fc8a06b3827 SHA-1: 23e8cb03f6021233d1047ac624fb4d2dc93c0729 SHA-256: bbe08da191c5f0f90c7e347d7069284e5ed676d317551166aff334ae093ad05c
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as 'Pdf.Phishing.Trojan' and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains, likely serving as lures for phishing or malware delivery. The document body was unreadable, but the presence of multiple external URIs and link farm indicators strongly suggests a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://emotionpicturesfestival.gr/userfiles/file/kimumuwukuj.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b157c1bcc---moponinubakilanitozitis.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bafcf226de5---zesulalugupo.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac040a686c1---31713716932.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/4u6ldsich361tfl6201le1plq4/51434179286.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4243931d7---21501186294.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a7deef64be6---27395263346.pdf
    • http://club-integra.ru/userfiles/file/romavevu.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160867b55e539e---rezudufosiliw.pdf
    • http://abwcoliseum.com/uploads/files/jinakomefemafirujabo.pdf
    • http://dochoiotovn.com/uploads/userfiles/file/lazidigizafiduxig.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd1c0a23b1---xaluka.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609990344c833---71663384757.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160acd99fbce91---91849152226.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/99cd83467c2942ebeb8ff2220e2006a8/32024789496.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/67fbba49d0d80c4161a7ede146127417/mijefotakizanajevamipaj.pdf
    • http://angelescare.com/userfiles/file/pisijonememivikateku.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/427622f26484ffa3d992afdc50765e10/beworadonanerofowel.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/i6qhg2ns4ste12u660cs5bn8kv/45664450012.pdf
    • https://sailstudy.in/ckfinder/userfiles/files/jotipedanimosobo.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609156ea19d47---91853926259.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/gf1g5nflp4kevk1skqn0q3hbp3/wifixi.pdf
    • http://pelesiuvalymas.lt/i/File/pizabupevimen.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=mabels+guide+to
    • 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_off00012df7.bin
d693209166bdd9176cb7d0f1183af1c2498955e182f2a679d76b4df71f70ab41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF7 17348 bytes
font_01_sfnt_off00015be4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE4 16792 bytes
font_02_sfnt_off000173fb.bin
b8680339e65a7d56f3ea71b7b9e19677f71022de56082e884008434b614d1baf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x173FB 10452 bytes

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