Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46c9b6d015797b9…

MALICIOUS

PDF

80.8 KB Created: 2021-08-23 15:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 95c3560d3a07ee7d25041d44ec82e18e SHA-1: 7a7f054220f5113ba0cbdc574ab5f139337d222a SHA-256: a46c9b6d015797b9add90b908037bacab7910d3d7149094357f21e276b5491ad
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malicious files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to decrypt a password-protected archive, a method to evade initial gateway scanning. ClamAV detection and ML classification confirm its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c21f62d8bf---63012263334.pdf In PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/pvcq79ljjlii40m5qk8hkp8cq0/depewiraropimivisir.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/file/1627943575_1.pdfIn PDF document text
    • https://qkon.ca/images/file/84445005924.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/27117b363a48b9e7d69952110dbf71ca/76355707798.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/92449220001.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609020987e776---65743098174.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/zerudude.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/53202918436.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e89b752f52---xujogatumeziwaturitowobin.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/xolakunedamo.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb3c04cc06---2003640729.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021061602060682.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/7814ab90a2c470f0b7f2508fe14b3984/53641128924.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160796eb41c3f0---resuzi.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d54c8be69dd---wafipibinuxirigelawimi.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/33384382039.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/09f80bf8eed3d5b7277d1136e7270276/93077032055.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/10642715757.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/bupojeforiwuvona.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2d833d89d---31714140483.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/0d0239c33fbb8ada2f3d1e3c5e7a3963/58803979476.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/31222873913.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=protected+pdf+to+jpg+converterPDF 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://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27E 10524 bytes
SHA-256: b7253047fc3e340368626fa5c3759b55bda3d2cea097299411205e3fb180a36d
font_02_sfnt_off00010a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A64 16516 bytes
SHA-256: c82aae9704654085cc204eb0743e7913e1fffc9a93cc017c63a09ac40380a155

Open this report in the interactive analyzer, or submit your own file for analysis.