Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e031f804908e48…

MALICIOUS

PDF

80.9 KB Created: 2021-09-01 18:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d92ddd8642173c57924370427f148e38 SHA-1: 15e3b804736e929ba096169cc2081e78e49aae37 SHA-256: 34e031f804908e4818cdf41a2fa48270b7bd8fbca4aeb4ed0050c8433e000f6b
96 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to various websites. Several of these URLs are hosted on compromised CMS platforms, indicating a potential distribution point for malicious content or phishing lures. The presence of multiple links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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 http://lhsclassof1971.com/clients/74120/File/70697389313.pdf In PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/3000c7b62196bfc319728d55db538678/rakuv.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/f2fc1079d19428fa08e70b8867dfb00d/wofife.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/tudegogiminulon.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/zogat.pdfIn PDF document text
    • http://hydrem.ru/images/file/wevalajow.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1786e8bdb---87535001246.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/gebugadeledufike.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/98914686561.pdfIn PDF document text
    • https://shopabrang.com/images/files/fogareleju.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/venuvona.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/zafelosomoza.pdfIn PDF document text
    • https://ikansambel.com/contents//files/39443323505.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/ef734ab77d4675a3aa6c6803bf842e23/kixutujarepure.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/mudafagiwun.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a0ea0d1f4---dakemopajitav.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/movofafagi.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/sejasipifisob.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/vowikeveses.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/n4uer6j8ntbd715mt3tvo7059o/35558667028.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/bigatawozedopupafuzof.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/wekasomewugadabe.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ef40966f---bomikaburezesalomegup.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/kogomomepitudobaxap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=shadow+fight+2+hack+version+download+free+level+99+maxPDF 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_off0000cf8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79E 19184 bytes
SHA-256: 83e3e3f27b54f3a8c39bd2c5c060231cf9145689dcd6e981e097b8c2629500e3
font_02_sfnt_off0001199a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199A 11632 bytes
SHA-256: 12d7a762ec87b6936b53313acb80acc989363f7bf85eff5ba6e25941c6ab70cf