Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9402a19d144f223…

MALICIOUS

PDF

363.2 KB Created: 2021-06-25 20:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c7d74c64f481018ed473055f954c519 SHA-1: 66ee1275075329a4a86036a8386fbd82a711ea24 SHA-256: f9402a19d144f223572824d4d2c64838276a3b155db256b0bfd2b2e9c2b8462c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, indicating a likely attempt to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to deliver second-stage payloads or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9791

Heuristics 5

  • 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.
  • 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://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097e6c4b29bc---71236513539.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607675805575c---ralepaborilewekekeraros.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/b72fef0ab047f6728dfa3fc06c1ac177/noduzunarevetarobipotos.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a762e6aa575---23817068676.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/mt592hrvgo1s79chtb6begro6r/55837833343.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/3780ae6879d1354909142922600caa7f/wifikejilavil.pdf
    • http://smflow.in/admin/uploads/file/bobetes.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16075d446503bf---kikizufiwexokibuvemuto.pdf
    • http://abogarestudio.com/userfiles/file/98577039968.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608315edc26e4---38674987890.pdf
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/20212015259.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084dd7a1d641---76624823072.pdf
    • http://avandcie-automation.fr/ckfinder/userfiles/files/ludagapeziladinojux.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a00307192d---51610775076.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2d85b5a05---15074044118.pdf
    • http://plkorea77.com/ckupload/files/sozesevefogimara.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/0g0m0uqc8jc68ri0t5t5gjru8p/govoxuvipomuxevoxepefej.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609839c5a09cb---joranebutix.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/sfc1fr9bskfvlqasggff0ip0s6/74537587281.pdf
    • https://liniagdanskzydowo.pl/files/58965494327.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/2338440534.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/4eh35t4b36qhbjkn6eq32epqnu/55500154123.pdf
    • https://businesslife.com/content/file/pepojidatunozikib.pdf
    • http://karunb.com/UpLoads/files/50308157166.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/ghhni8rmohntgmck5s4h17us2v/88105023574.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=antidiabetic+activity+of+medicinal+plants+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_off00053650.bin
1531ca836a36c1d05eb8aaefa49c77e2e2b63008b170f33cda153070ee35b9ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x53650 23220 bytes
font_01_sfnt_off00056c1c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x56C1C 16792 bytes
font_02_sfnt_off00058433.bin
b0a24b43058ca63873f43ca68c4f4cac09e7a4b57f6a87a62ef362f79cfdadbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x58433 10980 bytes