Malicious PDF — malware analysis report

Static analysis result for SHA-256 6080867e8fd87dc9…

MALICIOUS

PDF

90.2 KB Created: 2021-06-29 15:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b24d1e55f012d7ae9cdfd07d8e35399 SHA-1: d1c4e0294c30ecca3965bd6b97da7414f0814234 SHA-256: 6080867e8fd87dc98a5daf117365da5ded223aa059db73c60351d81bd717ba71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple potentially compromised websites hosted on various domains. These links are likely intended to deliver phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/7b35439b7f19d0cd968e953494980a0d/ratoreguxiwilufesali.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be72d6e1ef0---44210142079.pdf
    • http://tivatijapan.com/uploads/userfiles/file/vijibixomajudogajo.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/lj98q3n7ukfus6qg2ani3flid0/barew.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ae4f67f04---60904814049.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6121835e7---balirosi.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/uic16vpkcv8cpd3im0ou3rbge7/56252983439.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd1854c682---jerofax.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608865e254faf---13820804117.pdf
    • http://chiengthai.com/file_media/file_image/file/ruwuvukero.pdf
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/3040549280.pdf
    • http://kompletucetnictvi.cz/files/file/18827703892.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/nvtnundrdlvhivcjgqtksstppo/86163159826.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/572dad04788f6f6542001d2e85b86ced/9644861226.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/7479a8e3e5526caa72aca12d7877928a/doliredaduwuxasafe.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/61afa26222b1e7a47c2387dc8ac07df0/7638708087.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e374d16e4---rukejakovifotalika.pdf
    • http://qtjdb.com/UploadFile/2021/06/08/file/20210608_082311_150.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607195387f559---xivoketuvutuletatile.pdf
    • http://aimecostruzioni.it/userfiles/files/66159348933.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/kps0o4tt38c8i1h3ipd36d9507/kovojazoromatifulujumuke.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7ab79453---27082077373.pdf
    • http://rajskiewakacje.pl/userfiles/file/fijivotetenesegukev.pdf
    • http://centrons.com/uploaded/file/39945653560cbfb90cef5b.pdf
    • http://thunderstar.cn/userfiles/file/20210629163218222068503.pdf
    • http://busangh.com/attfile/fckimg/file///20210608164512_922171233.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=lords+of+chaos+full+movie+online+free
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc48.bin
5bc4e09de8512b9c3ce0826dd54930daff9b116a06af61cb4ab273760fb2d6af
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC48 10768 bytes
font_01_sfnt_off000114da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114DA 16792 bytes
font_02_sfnt_off00012cec.bin
c42d1408f163d266bcdfa0e9e30f9145be0eb9bc10fc18e13a74510dcbd1f78b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEC 17992 bytes