Malicious PDF — malware analysis report

Static analysis result for SHA-256 e649d2616d77e29a…

MALICIOUS

PDF

102.6 KB Created: 2021-07-05 03:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 949fe443fbc3493b8b17aa1886c31749 SHA-1: 407a7bf6885fac03bf19e73d81f45fd8875a74a8 SHA-256: e649d2616d77e29a9be11c789308a0032517c8970921be0f42428c43c57fc9a4
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload storage. The document body is unreadable, but the presence of numerous external links suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad111078b63---jiwibadojazojidakukefev.pdf
    • http://okulsanmalatya.com/imgup/file/13114596770.pdf
    • http://piri-piri.pl/ckfinder/userfiles/files/22691722859.pdf
    • https://shopabrang.com/images/files/lepufo.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071667db0daa---20391794074.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d636caf0e94---novetuxukagozuxopakega.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc3df5d70b---pisoranofuruvexisoni.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092238f1712f---87029994458.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160753c820f3a2---57500429395.pdf
    • http://yesilderecine.com/admin/editor_resim/file/56056115312.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/fdh3cb5u3pdlv008e0q4f0762n/jigupofuruwa.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16084f5f71865a---73453716943.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/8f2c5ee304638c02c636f23412dccef4/loduzujibumariv.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16076020bcf6a0---69685486873.pdf
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/vuwofopaxajozilupogan.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070fffa0d7c9---31172648721.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2621307d---86638489832.pdf
    • https://jurad.eu/files/file/ziwemovupiluzirel.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/4c86be6ee05651e6607cd9eef7570410/2845470610.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffad4524ce---litopojusugojogumilopipem.pdf
    • http://ibb-online.ru/f/file/tuwuzi.pdf
    • http://zdravi-kromeriz.cz/files/file/pubomogifobofuxa.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806846dd64c---zitufiwebovogen.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096538471152---70472945427.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/zejerebux.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=carbon+14+meaning
    • 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_off000129a9.bin
0c584797e8a0da2ffbc9ed9b40373a0efa0d7ec69146e893929fc3cda42fac95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129A9 19196 bytes
font_01_sfnt_off00015c50.bin
96e6f62266dbbee1b95571067f4f1983b57700fc245251c9cce2875b49e31ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C50 10440 bytes
font_02_sfnt_off00017408.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17408 16792 bytes

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