Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde30ec8a3684a46…

MALICIOUS

PDF

80.4 KB Created: 2021-09-22 13:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 78c7891cdf93310c7e6bbec2c095e44f SHA-1: 0ebdc3dd4cd90eff824955fc24abae000c5a8b28 SHA-256: fde30ec8a3684a46f4e7db3412509033b28dc4a87e17d5ee24675ba3ba81cce7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, directing users to multiple external websites. Several of these links point to compromised CMS upload storage, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://globalroomplus.com/bot/ckfinder/uf/files/zamovuwolujo.pdf In PDF document text
    • https://angkagenap.com/contents/files/49967915876.pdfIn PDF document text
    • https://carolinevlieghe.fr/images/file/mavujewumat.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/04f2ef607325b186265a8899bdbbde9d/38477281383.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/d5e84d6fcea83a48c430248d37a4549a/34426046919.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-14/20210914152244697353.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/6299939399.pdfIn PDF document text
    • http://ljjxmining.com/uploadfile/file///2021090323064750.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/30066267711.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/613a093f24910.pdfIn PDF document text
    • http://minhanh.com/files/vobagaxebakelubolaj.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/75495052793.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/31313806842.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/87775874500.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16134a1ffe3f1d---38697668915.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/nelejof.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/46198521473.pdfIn PDF document text
    • https://greenways.at/userfiles/file/52504537311.pdfIn PDF document text
    • http://free-note.kr/files/fckeditor/file/771297583613f74fd3c85c.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/geninuzewejiwavobafim.pdfIn PDF document text
    • http://reckdance.pl/userfiles/file/xelalewipamaneme.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/5248466989.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/guvutuvatawevogelof.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/torigunit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=2+letter+words+beginning+with+uPDF link annotation
    • 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_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 17200 bytes
SHA-256: 305691c0d3d5c1abef8757d6dd70eab4a06c737dc9ce0e1dfc49b80987cd0fdd
font_02_sfnt_off00011b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B61 10712 bytes
SHA-256: b56181eb8b3808c15a527be17b12c54e79db888398080a8c5593d0d7b271f57c