Malicious PDF — malware analysis report

Static analysis result for SHA-256 293fbf59c4aac6f0…

MALICIOUS

PDF

88.6 KB Created: 2021-06-25 17:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c34b3160730c75861d17ae2e3ec3d617 SHA-1: 698bd56085db6e9a66dddda23105fb5116c9d03c SHA-256: 293fbf59c4aac6f036ca4582ffff4de4db59e8c93363f86cd0fa1fd7b05c9455
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised websites, suggesting it functions as a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely leveraging embedded JavaScript to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://allytemp.ru/uplcv?utm_term=eighty+eight+seafood+and+grill
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/qibddrbv28kuhejp5ji7nvt656/xinasutigigepolobogud.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/a71a6d3873e0ef1789d3952182c7d5c8/kegenemisofir.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ae7c014e3---25520355391.pdf
    • http://palenice.net/obrazky_clanky/file/94304520464.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a727f8a55f---vevimegosilifaxe.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/669fc41eda54391f76f785fde54928ea/zedepibagaxofapodinonib.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/b0ec4137bf646069a08ecac2f9c296c3/gerimiluxexeduvanozox.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/ee568251070a18587af1251b9971dbe2/9544805812.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092c3ae6c7dd---wudap.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/81fe3a4262c2ccd63bea68ef1e712c4c/11245383884.pdf
    • http://xinyuemu.net/assets/202106/files/20210624163616354120.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/d111c9b38616df1fda340061af38a2f9/nutatipiv.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/6483050c3cc565712d8f8c06766123cd/69871735378.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811c80f201a---72515559567.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/df5b09bb6c9011b196608c9f2a27fe81/66023319120.pdf
    • http://seventyfirstclassof69.com/clients/60772/File/73908290142.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9de6872ee3c0a5daad38374b8da0415d/38556242284.pdf
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/zujawiseb.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/e2238fcfb9ef21ca5df189c5a9a5d670/wigaxegawimaku.pdf
    • http://megat.pl/uploaded/fck_files/file/waden.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/u9vbidjjcanefq6o2f56q2k7pm/4873776301.pdf
    • http://okmarin.ru/userfiles/file/zopopibijizejezotubalusip.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/g1b1erso2gcf4c2uhu4oi6np6h/gigetuxawizudu.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16079b3a6a9016---pewij.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160985da33bcb8---24770400049.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_off0000f3b6.bin
78520fb79edd5f751306db445d13ddb1a641d0c797fafe3707e532930abf17b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 18076 bytes
font_01_sfnt_off00012336.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12336 16792 bytes
font_02_sfnt_off00013b4d.bin
3ea278714089ec92adaa874052a1f475fc6ff0d3c7f111d4579990b3fec69fb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B4D 10728 bytes