Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b48d1fe2a617f8…

MALICIOUS

PDF

125.0 KB Created: 2021-09-01 07:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cf679b2eea23bc3de6661bb432c4ceb2 SHA-1: 5f65a3610d2f9d2f1af2efd23229790253a8b46f SHA-256: 95b48d1fe2a617f8dd802781417548cd42cf680db2bf91440067f1b61c484ff4
316 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It employs social engineering tactics, specifically a browser extension installation lure, to deceive users into executing potentially harmful software. The document also contains numerous links to external websites, many of which are hosted on compromised content management systems or disposable domains, suggesting a broad phishing campaign. The presence of multiple high-severity heuristics related to payment redirection, MFA harvesting, and password-protected archive lures further indicates a sophisticated phishing operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 10

  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://nomylo.ru/uplcv?utm_term=cracking+pdf+password+protection PDF link annotation
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/64295184261.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/zetinefatubizikag.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854a23bad8b---2751754344.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a10c07ee2---73892968263.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8998ca5a86---92505664588.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/76760766940.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210528/file/16221367318093.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/3e78f81728533f49008d44b01f370a97/jekuvari.pdfIn PDF document text
    • https://limsurdua.com/contents//files/netew.pdfIn PDF document text
    • http://asiajitu.com/contents//files/99154657382.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/wibidazadakuvakugataxozep.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/zenuzusobuwopinijozuru.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/33494077778.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/napozikejojofokepafoj.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e69bcbec64---29198497960.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/69826187362.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/f76f0e197fafbadd445fe0fdbdf66628/kowewoxoxubowulago.pdfIn PDF document text
    • https://stvorki.ru/files/file/66113125018.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/mk8peda6o1bqlf094c5q7one67/sofazopofidabaxanaworud.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/30791133110.pdfIn PDF document text
    • https://ntc-container.com/upload/files/potixapagepapur.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021071515132442.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/49229294117.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000180a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180A7 18928 bytes
SHA-256: 7fbd60dbb656eeb38e27b93fc7643fdb1ec998d6522b9af714e925c1a99584a2
font_01_sfnt_off0001b220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B220 10960 bytes
SHA-256: a671fb5b760d2797207d7695211265d034f296d96eebd1e6db8574e72b445dbc
font_02_sfnt_off0001cb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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