Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af9eebbfb3867d6…

MALICIOUS

PDF

95.7 KB Created: 2021-08-08 19:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8cbadf5a432134fd7e667f2389f9b02f SHA-1: 03511ed842f45475f8ff6ea26b387aa56b442682 SHA-256: 1af9eebbfb3867d6062a1731d939391b423f66a77e991032ae5829794e95c27a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals it functions as a link farm, hosting numerous PDF files on compromised WordPress sites and disposable hosting. The embedded URLs and the PDF structure suggest an attempt to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier clean score 0.2156

Heuristics 5

  • 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
  • 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.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5706fc8094---kijovademutoku.pdf In PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/68h7lulatgrhsmqga1pqgmm2q0/wuledatejonubudujunusol.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/doteboxu.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/9466649265.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca1d4eb38---duvavisafazofajasasi.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/jb0minvtkmgtaqq7u1cjpag394/25959610347.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/wenujedezonodi.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/3baea04a87f438f5382d699d36c2a4db/xexux.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021061922491780.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/75640766424.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a54f75bf9fa---84574285385.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/85579367280.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/veriregorujud.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160821f473d59d---vanezategazubelibo.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5cc4a0503---2036707127.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a7a9bed1938---kabimuvid.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd407c971a1---40819367373.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078193096a3d---fizeromifenowobix.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/7cd6dec91203c581c814c131f0c1ad42/95463169110.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608848226b1db---23512338953.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/6be59c981745c6e5eec41558a6dde3ff/gomeloxefefemizifumog.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/vepalo.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/vsopr7kipjioa0hk5stdv1ahh7/gimimeme.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/fmi16iui5rq24h1inut035o1d6/wijobozi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=28+creencias+adventistas+para+j%C3%B3venes+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001390c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390C 11012 bytes
SHA-256: d941f43ea04c2688609c4eed8cf71a38edae92f0c3f47fa146d415a4b018966b
font_01_sfnt_off000152d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D0 17100 bytes
SHA-256: e6a3619412b45d61f6ca9ea43e186ce5398f4290dde0fcda31d6b9a51f68ac4b