Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee643303fe38a656…

MALICIOUS

PDF

93.7 KB Created: 2021-06-26 23:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a4663a7aee83de18fc1afce862dda37 SHA-1: 5cef6a1d3181f1796556b4e467c8fd187aac8840 SHA-256: ee643303fe38a656ac1166b37eda3a95c7c26896fa69a3c1259c85a2d78256b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it functions as a link farm for phishing or malware distribution. The document body is heavily obfuscated and unreadable, but the presence of external URIs and link farms strongly suggests a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://oniceh.ru/uplcv?utm_term=new+orleans+by+night+pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa597ba0875---toxelogu.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a0ae10ce0745b9a9bd042c6793d1c699/42837816161.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/1db73d2671d74fa9524e6423f2eb1b09/losigaduzukenolesebi.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094758e537ce---29956300158.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2a96cc1cb---jajajujaturemegasup.pdf
    • http://tiramisu-o.com/yamituki-n/uploads/files/gufilifulesega.pdf
    • http://tv-kitchen.ru/files/files/sidet.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9185788500---67636925156.pdf
    • https://livre-art.com/ckfinder/userfiles/files/surudesidolej.pdf
    • http://axiomestates.com/userfiles/file/goritutireburo.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088cd3442c55---86098002077.pdf
    • http://africareview.in/userfiles/file/lazidatodixawaxobowudiv.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/3d720bff74a50d89f3fd7e4539491812/xular.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/d0de41d3d5183684ae48ed146170fa7c/34320889398.pdf
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/23b3dd727fc68fb88a9b3626e9e24ef4/ramilezoximezi.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6b18c5d49---22252218608.pdf
    • http://nowyhotelik.pl/userfiles/file/dibumuvekubox.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8b3789b1c50750244d2346302f3cc334/14230945748.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/rbijikvl0hrlfggugsek7dgbid/lodojivaximinimaxebixo.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/a927d1774fdae627a24ab3c0f8eb4581/sowapi.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c023ef9e51d---zakewigop.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/42bf35eb2dca5dc27159267619814372/88944752552.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be9dc73f856---lebesixezulodisamemo.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/ddb3m1apdj7bbsp9eb678ifvj0/rimamesinukixeg.pdf
    • http://szyuangang.com/UserFiles/file///88470420023.pdf
    • 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_off000109c8.bin
54d58d1c05180e05b85fd114b36dcf4880ae974102cd674e4e33cb87a2011561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C8 11096 bytes
font_01_sfnt_off0001233e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1233E 16792 bytes
font_02_sfnt_off00013b50.bin
b24e23c1d68ca50bba26e3318819465c5219900436b9327f5f1e9974dac9fd8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B50 17724 bytes

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