Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e68486ad694ea56…

MALICIOUS

PDF

95.7 KB Created: 2021-07-10 06:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f0f910ca8251a82be01d281b82eef791 SHA-1: 471b188dc9177fc4e76c8c79454b4a1837c777f8 SHA-256: 0e68486ad694ea5694b73c19d28c3906e0f2fecb6ce3c71ea78a69b6be2d7560
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely serve to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/94597a59da9829ac2d6c7cf39582ee06/87434451708.pdf In PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf7ffae121---25778508034.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/xilozesuja.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/ejful95k7aa8jcb4oeklkclkk5/26758607535.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/71106283080.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a626efa4616---42494971185.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/64668993561.pdfIn PDF document text
    • http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/1069647624.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/97407900944.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc8bc66a14---rixugo.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/d85118d91482f7a0df687badb2ce222f/88516931008.pdfIn PDF document text
    • https://goldenapp.net/file/wolaleluge.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/24606670951.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160e0119f44dd9---74184562271.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/de9a8882b1c80434fb65efbe0c729c71/zoxibigolozag.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/a06a8c62e94820d950ae706a2ecaa6c4/guwelizawowu.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/u3cn9aa8kin14o0rfmpclkfpp4/bokinitol.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092722a6ffe3---nosewefupurufigotijuga.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748e0af0383---merukenolifaloz.pdfIn PDF document text
    • http://rajeshjshahani.com/clients/d/de/defaee86e9f1fedea086b53a5072ac2c/File/69877148222.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/58976959911.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b133d76b73e---30638369052.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d33b6e9aeeddd6406e5c1c4d77e37f5b/guniguvevunabuzesexuwe.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/3bf15debf814d03a0266d0e351f039a2/dosudebalovog.pdfIn PDF document text
    • http://diencohoanghuy.com/media/ftp/file/53223441334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=we+real+cool+themePDF 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://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_off00011d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3A 10124 bytes
SHA-256: cbb4a32973db2ae933f1afd4b7f68ac2b92ccd8d319406c69c4f59c13c2a1aab
font_01_sfnt_off000133e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF4 16796 bytes
SHA-256: ec8484383390c91a9195c1526f33e5dbbf047bd10c53f4384370d203dc08bb44

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