Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0950f9faadb507…

MALICIOUS

PDF

77.8 KB Created: 2021-09-02 02:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7d9795639551ad840a98ca0c710bf075 SHA-1: 6501633aa543b73a511ac195cc89e8b95a2c1256 SHA-256: 0e0950f9faadb5078706de1deb3be90b7e01a407329c3bb4a55ab96e083f4213
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/5lqqghf2tpq98mpqfqii2rq0e8/ladabox.pdf In PDF document text
    • http://kaies.cn/upfiles/2107230534394419606dwt8s.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/15482239462.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8c0ee79df---90645696805.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/8237515af27afe8570c61f7da2557f9d/54369277269.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/tixibemo.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/a56e7db80a8cbfcd289acb54ec0ab63f/1254525211.pdfIn PDF document text
    • http://inercial.es/uploads/files/97355801642.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eae8f746b4---19083960988.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/dakilugagojudawe.pdfIn PDF document text
    • http://schokobrunnen.com/idata/rulupelapufogisozotebetu.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56c4c3138f---nekeka.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083ca521c642---5848198126.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071a43d460ea---fidepopaxexozopis.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/xepevaporomibovuwakiwuti.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/2493aa0c67f426d8f7c902802054051f/27476268308.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/37b507d84fb4a33d112a275172ab2dc2/vesujuvakebuxaxiseruf.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606c902b71b28---83516679412.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/xirena.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad8db71ef7---welolafederafosol.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/38962258210.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/zuzubimik.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/08daf63f5e2f5de8d3dc742f5672afec/kugijasoxegutetagagan.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/52069804172.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=homily+for+todayPDF 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_off0000cbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 17992 bytes
SHA-256: da5e98baec9787433733b4c1d0310f1f07648c09c71ff048c6f4467d9af4f79d
font_02_sfnt_off00011231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11231 10216 bytes
SHA-256: bf1457a8e6894f4d5f48bcaf506939f56e84a52e7a1f2d102a2f7f5a3b2ab5e6