Malicious PDF — malware analysis report

Static analysis result for SHA-256 969f6703d36ec2cd…

MALICIOUS

PDF

79.8 KB Created: 2021-08-22 01:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: b924c3d8cd7c6cb5b22b5e729a847870 SHA-1: d8247116af5756e00819559d93281f8204584229 SHA-256: 969f6703d36ec2cd7e92c751fd896fcf29d9dc4ef46a8aecaffba9a8604625c1
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcd6c29e16---nomolaronoxulefizasegurap.pdf In PDF document text
    • http://gsmontaggi.it/userfiles/files/39778901665.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96fa438d56---36668296711.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16103aec0e8c85---fesazemipofekogivujis.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///dagujusajov.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/16fdc34fe6ed5c0e8edc3c67dd8df55f/jukalawejuletenezekuwa.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/49574464331.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/59774296723.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/69414516050.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/8416952755.pdfIn PDF document text
    • http://sequoia59.com/clients/867919/File/xuturabega.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/10885903298.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/9bc725f1e6337fd0d0783d1039175b72/50879740590.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/mchtd0m13nuqi5bchi59084k4e/80441058216.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/cefina10cstjajf0bm6jtqf1ls/82749474985.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/jenomabufaz.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/juzuzuvegozi.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab61e3079f2---gukumunokelegalaz.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160beb90dd86f3---19811314103.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/weximonazatafukuk.pdfIn PDF document text
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/mufujogenige.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/radabadujaribegiporun.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/24999284417.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160db9e78c868f---mawiraxixig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=building+drawing+pdf+free+downloadPDF 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_off0000d30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30E 10648 bytes
SHA-256: 654c0796003f2a2a03f3c1cc35e9ae69e05cb4cf1c4b44f545c6a99a1e14d980
font_01_sfnt_off0000eb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10367 17136 bytes
SHA-256: 04f29ea954c34bc7a118a904ce59d27b98b1d22860b5047bece7a9e136c2adf6