Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6cd5b6607d3a30…

MALICIOUS

PDF

74.9 KB Created: 2021-08-21 09:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0f65beefc784856b50876dc71e0ba697 SHA-1: 602c702b21489aed99ef3cd2e42e622ed8352186 SHA-256: bd6cd5b6607d3a30dacc1665db3921090ebd7ac0ef80ea004dea029c4425260f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9783

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16087990f0f5b3---wuwadujelaguxutosarojewul.pdf In PDF document text
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/1d913c1d62923e318eaf7db0709092c6/82755355865.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/sepilalokivisuvinibaz.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/94jkp8kkt8meal62qpoe3o23g0/zivigujeduwujasimatole.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747b966a15f---36254470841.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/bojifuvevatal.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f30b32e04dfd02729dd02b7b7c826742/74901740189.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8933dfcd2---migigokuxirijam.pdfIn PDF document text
    • https://bloomeng.com/uploads/11876394638.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/72576910104.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/s1qkatdd1bhevdn4fc1eo7knl4/45681235433.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/pekojevududojaxuf.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb0e2d5311---xubibikenuzajomezad.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/kegosilerutavadusefin.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1623747950.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef767f3655---80225294402.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/jazotituduvaxufinanexulev.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/jozaxososu.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/13103970330.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/fd66362400bdd740ed25a24c14194381/48946819392.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/f504f6ef96fcea5d9813bf47931ef546/nodazadulonimugu.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/19845319505.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f113f05f4---30059516522.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=calculus+adams+solutions+manual+pdfPDF link annotation
    • 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_off0000ce8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8B 16560 bytes
SHA-256: 5db88344a819e95f8e037726037f8da15493fa4628af5873008a878eb98aace7
font_01_sfnt_off0000f9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CE 10680 bytes
SHA-256: fd921f11e7765f121b4196cb75428180a7fe84916998997b31aa94b1260832aa

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