Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1fc26d524046ba…

MALICIOUS

PDF

72.0 KB Created: 2021-09-09 07:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f499023ce6e793417939d878b3fe77b8 SHA-1: 2014b9f5a0873e428d2fc64c9ffb24c5568a03a4 SHA-256: bd1fc26d524046ba06daf1061cead1c25e862cd3ed20781dfdeace9672a418e3
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. It functions as a link farm, directing users to multiple external URLs, including compromised CMS uploads and disposable hosting. The embedded URLs and the nature of the heuristic firings suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7446

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 https://garglob.ru/uplcv?utm_term=how+to+get+any+snapchat+password PDF link annotation
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161397aa5afcde---segirop.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/80954429531.pdfIn PDF document text
    • http://chayka-svg.ru/files/62651412907.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/bebubugov.pdfIn PDF document text
    • https://domilot.com/uploader/files/gilolof.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/73004277675.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/72008929939.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/vojapemejilupe.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137db2f46252---sojazojikitizanufoviw.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/gukedonigodibidu.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/63653368528.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/tubedifovimetivut.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/wedorurit.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/bitomepojog.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/59981600230.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339a6934faf---gexudujurizi.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/21342008284.pdfIn PDF document text
    • http://khacvietlaser.vn/public/images_news/files/27991395577.pdfIn PDF document text
    • http://htwy.com/upload/file/pemuw.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/disejaleropebomota.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/87734843694.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/39547307343.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/39130981552.pdfIn 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_off0000bf36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF36 18596 bytes
SHA-256: 6ca49d14771a0151a373d3719fd09ec571ff410590b7caa4c6968879c3b4a9f9
font_01_sfnt_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 10844 bytes
SHA-256: babf08bfed5be25fe160119399bc089e2e788ce811673fef5115189a63dadb88

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