Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb1b24ed6aa91c9…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 16:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 35b3e1d7100b949cb0ca06369ffafbc9 SHA-1: 116093c2480ec63084a8933e03160fe4af9f98ce SHA-256: 6fb1b24ed6aa91c9e674f996ffb8e9ec2c1d49fccd9ed640d5bedc980a600b49
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also features a link farm pointing to numerous compromised websites, including those hosted on disposable domains and compromised CMS uploads. These elements strongly suggest the document is designed to lure users to malicious sites, likely for phishing or to download further malware. The ClamAV detection further solidifies its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=cooking+scotch+fillet PDF link annotation
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/80871989055.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/76569995393.pdfIn PDF document text
    • http://erex.hu/upload/file/42327974632.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/910235d21dea278bf6b8573bd16afdf3/69542708267.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/todifixupememajoda.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/6319ed44d8c70db612b0727bceb883bb/juramifidifos.pdfIn PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/rorafejewuziwimevuzabezoj.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/96055815790.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607264772587b---satisop.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607406afe8692---19876679811.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/2487307589.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/forexosulumimada.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/17358671530.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/61388810620.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/xikuposopivatokubojibode.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/fukonadomomob.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/pq9nn0l4fn8ftefjskva8lqifi/48570808096.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/boxezuwitoletados.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160934867e6f7d---kepedolawesakovana.pdfIn PDF document text
    • http://www.siposferenc.hu/html/devifojipekekugirilusaba.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d86c146958a---5426157361.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611daa7c38134---70744408310.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b8cdda82e---vofurazovafusuxerulo.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/jofojozagemodejofi.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_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B0 10476 bytes
SHA-256: ba9de137847482ee6d9431c62ca1e50bad581f61da900a628c6f79d0d8cb4642
font_02_sfnt_off00011172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11172 17516 bytes
SHA-256: 2a2687e5a7504c757fa0c9ebd4b0dcf67fa01290e46a5446c4f8f1126268dc93

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