Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb2be953f603731…

MALICIOUS

PDF

91.6 KB Created: 2021-06-30 11:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b55c1c73be33e07274e08d4b019e317d SHA-1: dd7a921a5327b58f009a1b96061f668baeb7699f SHA-256: feb2be953f6037310c45295edd6a90b41cc83ff9e10c6f3b9e44049bf4141be5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which are hosted on disposable domains or use SEO manipulation tactics. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common method to bypass gateway security. ClamAV detection and ML classification confirm the malicious nature of the PDF, suggesting it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://inwebjor.ru/uplcv?utm_term=the+pygmy+people
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/b7b90933d5c9184d6122661dcf5af6c7/wenezuxekisibifuxonanot.pdf
    • http://bbfederico2.net/userfiles/file/vujevegu.pdf
    • http://velo.hu/UserFiles//file/83895162424.pdf
    • http://waypl.pl/upload/File/bifinalivodesoz.pdf
    • https://computerzone.pk/file/romadowej.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609202655aaf3---84001410775.pdf
    • http://colantuono.it/userfiles/files/63021553240.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/2a75837040d6b3c75a22746758c208ec/4443223088.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48ac122677---10078866288.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/6s0va5sl5iieob91sp50re4eog/xekedokiwux.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/eium18tp4k0hvssp74nttid4j1/67582827832.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/60c511099fb126670510743b594489b9/zogipenesanebejijixatazok.pdf
    • http://turskazka.ru/ckfinder/userfiles/files/12669186595.pdf
    • https://tort-art.ru/userfiles/file/mimasigekadapezoranuna.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/g8cv7fp2tosld8ohs5qpfmjb0v/bugikibed.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3056868f31---folafunuvitapoworifu.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/f31df632d46456f4c867643ac68d935d/5102080493.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/0f5ae6f379cbd59bd86079f2164921d9/25423435811.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/800447535609b87f40ae3f.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/ff87234a469494a6af14ce582496c82b/99627256503.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/fdb589c678431b45e82ed1868f97b88f/77482961780.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd90ac1cc8---rojosutametilariviwela.pdf
    • http://arci-mp.fr/admin/File/gewamev.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c7137ec84---vebaliketidutedu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eff0.bin
0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 16448 bytes
font_01_sfnt_off000106c5.bin
ce4e74a6455a056b2d53f920a1567bfd820006930b25ea1ce0379c4bbb8aa698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 17032 bytes
font_02_sfnt_off000132a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132A3 16792 bytes
font_03_sfnt_off00014aba.bin
b32d5d3f6fbc19388fe5d1ec7df7eb275efed092713dffacc4c4303655540d7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ABA 10052 bytes

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