Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe63efb518a768e…

MALICIOUS

PDF

89.1 KB Created: 2021-08-08 15:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 34c142f249d0d8973a3f4676b52c85fa SHA-1: c6891fa7406e7a4d3d7f77c0aad063cd9cf80078 SHA-256: ebe63efb518a768e08c6d4e05d27a44f1adab77fb99d61932e81ce2b5a79e679
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing or to distribute further malware, aligning with the typical behavior of malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/akodptmpnntlpm816bgdr1itvs/69026337315.pdf In PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/tironif.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/53704744665.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe75da03950---nerusa.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/541b10mdd6nv3oki2na6640cc2/fuvipejumapevexijamimugub.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/ck83h8pcu0no5rhqa72m9ut3f3/sugoruguvegituguxabed.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9d5215407---88511548311.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/87656121925.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/0cb67c08050c2d249262527a7ba5e375/85609441621.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/mutokuraluzojapagewoxipe.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210609044944.pdfIn PDF document text
    • http://leton.pl/userfiles/file/rafamibatovejodavevuj.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/da0d0ea9b0ea55635451e1474645f348/37264881184.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a266ab35df1---wetefunugutamedopexapita.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/55964771706.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/zipered.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088ae4c5d731---67023402744.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610df60be39c3---pulolorisodabaze.pdfIn PDF document text
    • https://laserbeautymachine.net/d/files/57580071950.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/32977158782.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/84587732800.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/52775679103.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/jo8ho3aqvdlj7ongs68gjdin73/zilivamigirigenelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=does+arby%27s+still+have+greek+gyrosPDF 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_off0000f726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF726 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F38 17252 bytes
SHA-256: c9cee88af963e47db1617954aaef5662cb8457278a1e63c3b1d88592665f1785
font_02_sfnt_off00013c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C8D 10732 bytes
SHA-256: cbe2fa8814a6d27edc3d212f93743381b25302174262b40e92886fae474736a4