Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2037b29418e0eaf…

MALICIOUS

PDF

78.0 KB Created: 2021-09-04 05:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6773b2723137e83fc2b2ad1d7f7c501a SHA-1: 8af0ebbf7af8e32d341d0ca4635989ad4db92f55 SHA-256: c2037b29418e0eaf5e7db100f0684da37770598fbd717972b18daac779d0a9fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and potentially disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The presence of external URI heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://escaletravel.com/userfiles/files/64199144265.pdf In PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/48406881ac98fee9af2ed39732485dce/vodarijavudibiwopalutof.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/34262566156.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de26656e511---miribugolevigolexurefi.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821961999c3---mexax.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/bc67732bd285bba8d874f5093102d07b/gopuzinibusodisoza.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d3861ccf04db9d2c21e56aee516a2361/51417911432.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/f39vvvnvaqjd6p5bthqo3ha71h/lugixeli.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fiwivixisab.pdfIn PDF document text
    • https://rosycaffe.com/file/8271323771.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/l9pb3p960mjsf7c7ol8q7ur66q/66759829678.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4616975c8c---90845954851.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/27402311070.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/cv692fgqttu2rdfl4bqbf083ol/labomedesiba.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/24687394312.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/bozojolusi.pdfIn PDF document text
    • https://airshow-bg.com/file/nadebifogemabibapabe.pdfIn PDF document text
    • https://promtong.com/promtong/temp/file/miwilolunosubora.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/ba57b7761b6746afd687f90bee74c8e6/fiparugobevi.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/70377080355.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9f1585163---25691979262.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/85110329180.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/welapijupidu.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/movaxutujitibef.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/93606dbe2216dc5a8b048bdd9640149c/77179860205.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612557ffa6e88---4476659841.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/21965384513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=english+vocabulary+test+book+pdfPDF 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_off0000cc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC84 16500 bytes
SHA-256: e40d6a5ded6177281023c3634cbd982c7a8bf4fce6e385d12d52bb2a948830e0
font_01_sfnt_off0000f750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF750 11392 bytes
SHA-256: 6696f4138f23d65159ab97a1f6e1d9f9030babedd016f4f8bcebbb796ae0c30f
font_02_sfnt_off000111c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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