Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b4c2dc6aa3ff54…

MALICIOUS

PDF

80.6 KB Created: 2021-09-03 02:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0aae227fa54ab0e91c19b6dd85855684 SHA-1: c9a5490fb87b418980af38579a322c0f7c050dee SHA-256: 04b4c2dc6aa3ff54b39388c6a9ef0d84c2214c14873b3211297f802fe12deb81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The presence of external URIs and link farms strongly suggests an attempt to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://synerhu.ru/uplcv?utm_term=account+based+marketing+for+dummies+pdf+download PDF link annotation
    • http://henca.com/files/details/file/94584180303.pdfIn PDF document text
    • https://shopabrang.com/images/files/39040560917.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/b0fb858961a461a43c0d0dafd24cb01c/dubos.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b750f4e30fb---42705197491.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609ead6ddb8eb---96399884096.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/dowidu.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/35270710670.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/ac2511ae98cb7d2182cc0919b00db65d/95544529401.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/27348299338.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982b5c26ac7---68853861281.pdfIn PDF document text
    • http://farashimirooz.com/files/86123417627.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/94588291594.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/rukajo.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/46802303955.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/kosumupefoxojixepexalaru.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073a2878803c---23484144388.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/xewogam.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/41852422238.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/3db7f670c1c2678aca3a671a0ed42d83/zenajagarikitotirusom.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314836c9ad6---4526169395.pdfIn PDF document text
    • http://frchem.cn/upload/files/xizatofasuvugudejusu.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/regana.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/kigivonovujepubux.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/daxev.pdfIn PDF document text
    • http://fullx.net/files/sedevotogosiwaxedo.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_off0000d51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51F 11364 bytes
SHA-256: fd7144f1429a98714ca514690f50e4d32588edb0c80a2620faa41edccf37dac9
font_01_sfnt_off0000ef8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 17244 bytes
SHA-256: 28e00621e2f4e1d6d556684521f94f27528adfbe3d21776058929145526dbb37

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