Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c02bfa552e5d817…

MALICIOUS

PDF

86.7 KB Created: 2021-06-30 02:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 50c693161cba483a9014ae40166f3e76 SHA-1: 73f602d4fb48e0c204577491b5b6bb50bf9aaed5 SHA-256: 9c02bfa552e5d8176305b349fc4380727a2495febd568dec9f5b2f320abdd148
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document that employs a social engineering tactic by presenting a lure to install a browser extension or update. This is a common method to trick users into downloading and executing malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of numerous links to potentially compromised WordPress sites suggests a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d2aec4da3---61146394378.pdf In PDF document text
    • http://etcad.net/np/upfile/file/88541006209.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e32751d464---48224702245.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea2aaf00c9---pebapeziruveridusiwoforib.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/lovoxofovatazu.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/34050727795.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/bowawugavojag.pdfIn PDF document text
    • https://yellowstonewildlife.com/mozopoxufu.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/kopolazaxaz.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fb4db1ade---83952655836.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608489a7c5d5c---nituf.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/18175726139.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/510cbc254368b83f8c154a4cd7a163b8/nedolu.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fab35d4a2---texofobo.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2c44cc5c3---943597278.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/88768674512.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/19940340657.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b080dc7450b---zizikubuzixad.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/ff66600e3gui65paemgu2d2960/mujinesatoti.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/028007d41b63d5b29655efa99df3af52/gategiwibom.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/s5ng84i2o5fi5535fbgn741pns/97703271106.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/22280954610.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a293f0d3a59---wapifefexus.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/5f75ce73baa67c3f19b0c27a41bea24e/xufedar.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/0f1aae1b7d705adbdd890f0d6a8f4213/tufunujajagamakowudunuvor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+get+aimbot+in+pubgPDF 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_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 10596 bytes
SHA-256: 06e06fe64bc2659e80305441c242652aa608d91c208e4886c0bfa3b00a8eb593
font_01_sfnt_off0001098a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098A 16924 bytes
SHA-256: 7b5d5a7f1ffe5af6e57f68bbc85e02c6eeead8c827ff21aeafc984363a143a84
font_02_sfnt_off000135c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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