Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7bfab52e76b0e8…

MALICIOUS

PDF

80.2 KB Created: 2021-08-26 02:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9cbf392d9e3cc89bf20a09df9564e685 SHA-1: 4600fc26bdd9ee1a6270a4fc3aba380cad7f468a SHA-256: ea7bfab52e76b0e8c31ba38fe31caaaa205cb188c28fcf5473769c40cdbbb832
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of numerous URLs, many with UTM parameters, suggests an attempt to redirect users to potentially malicious content or phishing pages.

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://coretry.ru/uplcv?utm_term=36mm+to+cm PDF link annotation
    • http://o2ashop.com/ckfinder/userfiles/files/88056443083.pdfIn PDF document text
    • https://castel.ro/userfiles/file/bojaxi.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/lefapejobizevor.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c30ac19fb0---rabifapakebiwonuxu.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/58fab1696b5c2686dc48ce75d0791589/kekobiromugisonavid.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/49309648477.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/fuvar.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/59918175309.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/74005921772.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/vejada.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075db1b90d83---64787528528.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-20/20210520054925932386.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430001416147297.pdfIn PDF document text
    • http://bonsaichik.ru/images_uploads/files/2708329082.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079e2d0143c7---puwef.pdfIn PDF document text
    • http://wirheiraten.de/images/file/jatowoxivixarawewov.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/21802940981.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861dda21256---bixavarem.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/da257e3494bf1c3ffc35825754d043e6/36236934281.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/01b046415e55e1d565a08fb4d0cb91dc/mikitiwatazukifijaput.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc2aa8b023---59092338258.pdfIn PDF document text
    • http://gyobel.itpublic/file/47827607622.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/vamavudax.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/39390521459.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/4eb3bno5bfi07ve4l7ovcst1av/2421723361.pdfIn PDF document text
    • 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_off0000d006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD006 24764 bytes
SHA-256: 04deb51e584f3d6cb86d5e9ff1aa5d340827c33992e99c7e25efaac8ff97de69
font_01_sfnt_off000105a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB6 9832 bytes
SHA-256: 1e48c23f242034b3962c33913eb0e4390a07079f78f3cd4d24f274e1e6cd0e1f

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