Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8fe59be5056a1c…

MALICIOUS

PDF

87.2 KB Created: 2021-06-27 06:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 629ccd3e4a3d34a88907fb57ae288055 SHA-1: c7790534924be853aaf7b6d662e1777bf3e6f920 SHA-256: 0e8fe59be5056a1c8c56c8dcce75f1c711f5f50f4a41bf24b5adb1521bc3944b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7fcddb745c2ee135aa02d1cb4b5c3373/63809038370.pdf
    • http://candientuvibra.com/images/file/32353915779.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a79c79ea765---13861758202.pdf
    • https://aulacvn.com/upload/fck/file/86682211100.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/8f534df3f794ddef7ce8b3135d4f896b/15323820441.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0dad617539---46850552061.pdf
    • http://espacioschillout.es/images/admin/file/422081524.pdf
    • http://www.hydro-tg.pro/upload/file/70413876960.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/fomadulo.pdf
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75834836681.pdf
    • http://gtshotel.it/images/file/jijitigeretanupov.pdf
    • http://cesishotel.lv/res/wysiwyg/file/sifekudogobaj.pdf
    • http://doks-films.com/pcms/content/file/36385221477.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e64e902302---fotusabetunisuloj.pdf
    • https://icbacademy.com/upload/files/55313931013.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/q0uhr0hdtrjmvdjdnl5co98u3n/75284395480.pdf
    • https://clickkedai.com/userfiles/file/nasikuvarofefolofosiv.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0a8f6d7185dcf9fcb4673a23c37d0b83/zilelanu.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/omv6a867vmi93evg8g25k2o5ti/35667266098.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/b7b87c868edaf38886546e4ecb9e16b1/jidibu.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/10046008980.pdf
    • http://czdashan.cn/uploadfile/file/2021060319455373499.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=frog+to+eat
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c6.bin
be32a2ccd01cc287700da5f51b4266b1de632d918a354ba11a666c37dfa37a4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 18252 bytes
font_01_sfnt_off0001227a.bin
57331fdd6f82976426f532397ef2f0046b133a048016a55f35fe502f8632ac0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1227A 9848 bytes
font_02_sfnt_off00013841.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13841 16792 bytes