Malicious PDF — malware analysis report

Static analysis result for SHA-256 52bfcf6efb0adf89…

MALICIOUS

PDF

81.0 KB Created: 2021-09-20 08:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 29f698cceb73662be8686cc6dbb3ac29 SHA-1: b3ede93e36a4dfa9d27b8f6dcefa741fb8cf15a6 SHA-256: 52bfcf6efb0adf894ada3a0bec0b773e1886c8be7a83bdb81fec6ae6c10f7756
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to redirect the user to further malicious sites or download additional payloads. The extensive use of link farms and compromised hosting indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=light+reader+apk+download PDF link annotation
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/c551dbea8db2cc808e7f855f97e9b879/62543622147.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb72d9a951---52360296991.pdfIn PDF document text
    • https://coil.hk/upload/files/47890430975.pdfIn PDF document text
    • http://alptw.com/images/files/penezesuz.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/bedipovuvetegupiraxexuz.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/115c4e8ced152fc3c409a423f241c13c/dagawelopobofofob.pdfIn PDF document text
    • https://majubesar.net/contents/files/67391260511.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/95525475558.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/xatodisuvariguto.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///48916202922.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/11536917654.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///xufet.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/57065053951.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/45504100817.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/witumolijutogiwa.pdfIn PDF document text
    • https://akvaguru.hu/user/file/jijelogaziwolovojonopa.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/97737209494.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-02/images/files/gususu.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/gamariviwudakapuf.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130433e549c4---47606691465.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/14053897896.pdfIn PDF document text
    • https://wineart.online/userfiles/file/21986058755.pdfIn PDF document text
    • https://kiofruits.com/admin/uploads/files/vigeb.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/jt8simf5a3hcdavss70s5paiap/lenofavaxep.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/tiwukoxezaxetelemamafela.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/61435868698.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_off0000d78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA1 17996 bytes
SHA-256: c2c0028535fc86a518a74770e33ec55edb87eb1f2f6c9655b9a9940d189940e4
font_02_sfnt_off00011e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1E 10636 bytes
SHA-256: 27adf414d474bf1bbac8781e74175d5ff9ea1d4c112a1778fa0bb06ee7169b7c

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