Malicious PDF — malware analysis report

Static analysis result for SHA-256 0474fb9abb10d6ec…

MALICIOUS

PDF

82.6 KB Created: 2021-09-09 18:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c3f10549303a62977de148111c1e5adf SHA-1: 44526c4e5b87018bff4e66a00bcb9ec786b6b7b9 SHA-256: 0474fb9abb10d6ec21ad6af3ec75ba0a75a723c02b80f7ec166b08a86c37583b
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The presence of numerous links on disposable hosting further supports a malicious intent, likely to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://granitabrasive.com/editor_up/woziwa.pdf In PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/43573014639.pdfIn PDF document text
    • https://stopserv.ru/files/file/rewogorux.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/89246566377.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d44c17363---81971250624.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/10400667632.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/29282590510.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/61464582842.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/mesupakegubevefigut.pdfIn PDF document text
    • https://gdaniec.com/upload/files/77148357636.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/32162816377.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/58976877211.pdfIn PDF document text
    • https://renault-service.com/userfiles/2278823554.pdfIn PDF document text
    • http://surtek.biz/image/files/20150321_201106.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/nezibi.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130db9eba6d1---99882050584.pdfIn PDF document text
    • http://ucokampen.com/media/files/masotiwenemonizidixato.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/luvimeriz.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/691acqa0alrjemn592vmui9kq0/35926051345.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ac4f54270---jetudizazin.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/gagaxiwitixomebozeb.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fadez.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/jobejakawamajina.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/kixubabozalan.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f9148160a---kivavitufatonenekufa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+download+using+videoderPDF 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_off0000df26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF26 10664 bytes
SHA-256: b04ade0c829368eea6839361edfd1bb7215e4a90300528fea858fc7abdefe067
font_01_sfnt_off0000f782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF782 17484 bytes
SHA-256: 1a30a3561417bb372368d1d62d862be36c4520ad059a3c5905225d7fcd8648e5
font_02_sfnt_off000124a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1