Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03f620465a47f09…

MALICIOUS

PDF

89.5 KB Created: 2021-09-04 17:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 46ae237b921d71903da1b7f1c3059091 SHA-1: 8cd452d47278c6e200e71564abceded002eb2751 SHA-256: e03f620465a47f0988409d392667af9c0ce78497d0d6f1efdb6ab6a4f94ba28c
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating it is designed to redirect users to potentially malicious websites. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the extensive use of external links points to a common tactic for delivering second-stage payloads or leading users to phishing pages.

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://catamma.ru/uplcv?utm_term=gcert+history+books+pdf PDF link annotation
    • http://ramenzoni.eu/userfiles/files/67848913307.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/birafemuridegureka.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/molesogosekabijulobelex.pdfIn PDF document text
    • https://premium-house.uz/images/file/basefexisizo.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/6cf7b3306dd38f20741ed43acfecb80b/85215405365.pdfIn PDF document text
    • http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/4245005722.pdfIn PDF document text
    • http://unseretochter.ch/images/file/80189141959.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608873ff9e400---faxosezilam.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/8f77375955da948a046864d176c4920f/paxeliwawix.pdfIn PDF document text
    • https://marosme.ro/hirek/file/refosarututozajisobexif.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/70c55de2d539657814f77468bce16857/66838823562.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/65601294237.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/070c30ed57468331f6bff62903e14db9/15451103876.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/sokekofimekenobil.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/48072427307.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/0jt372kbp2382jbjkc6qk8gbe3/3702894136.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/pozovod.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/d780789067b2cc9e9e5297b5d77b7cf5/81541388467.pdfIn PDF document text
    • https://haisanquangninh.org/data/dulieu/files/xulamijogipen.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16091de3237e96---pilizuni.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/47e88bad73f1346353672d36d0cf3c1b/duponoderakugonapidipe.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ee8c1qn9fdsin29ebjb4eh36ii/wogepaxunowafobidegosim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74D 18852 bytes
SHA-256: 1bed5cd7252859ed2790a09581d389ce82897f05eb59ff675e2d1a1c472ebba5
font_01_sfnt_off000127d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D3 10788 bytes
SHA-256: cf00b2f6dd57af14b58723e015ec29f14fa7ef302ee2a2d13f2c00179502ddef
font_02_sfnt_off000140a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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