Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea0d2d91debba26…

MALICIOUS

PDF

109.6 KB Created: 2021-08-06 05:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 5ab2ce73f4b3aebf8abedeef77e02256 SHA-1: 1ffaa1302fff3eb9501af8b4bc852516dd6abb3a SHA-256: eea0d2d91debba26ddd7a786de766a4a9c7000ff8910f6ce193fccddcf59e0cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=goal.com+latest+arsenal+transfer+news PDF link annotation
    • https://ivanda-commerce.hr/userfiles/file/92477292488.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/vizirirasebubikaneduwuja.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87cce095fb---nuraral.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb22c46090---36454927369.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2239e20402---pefegivetakilu.pdfIn PDF document text
    • https://whitesal.com/data/images/file/1169_20210707184359.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/aafee1a5c2c2a52740f37cfcd7dd23f8/50413769561.pdfIn PDF document text
    • https://fallsplat.se/file/zijeridi.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/228427ec303cdb4fff4e5355384a6ef7/sozuposalosufojen.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a922b636a---69937387157.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071f66e1d1de---46420921518.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/mufiduvonufoderetog.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/31343275863.pdfIn PDF document text
    • http://abnicum.com/files/file/7760246323.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210506230421998.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/gamirugoka.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/2967731a52db7281120aa9db781a1392/39456260638.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/48922906757.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/d5369d7a30883ad6f561813babc577b6/dalid.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/bezojadebowowejo.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090efc090530---bafetebo.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc3ada65fc---86071639955.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/99139415055.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608186d560748---rovisef.pdfIn PDF document text
    • http://s250801404.onlinehome.fr/img/uploaded/file/zitewe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7D 10596 bytes
SHA-256: 6ee27ecc8f9849aee893f57e391d52f1c947fb962e64594f7e9ecc6fd4800f33
font_01_sfnt_off000143cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143CD 20424 bytes
SHA-256: 30bd22664ce5f93bbc637a586ee64e346c1149abe5dd673380888d84c4a230ea
font_02_sfnt_off00017881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17881 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00019092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19092 16752 bytes
SHA-256: a0d3911752c475b5b6b91f2ce7b6ea0c34353ef7790bc1d25db24a3b636c45c5

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