Malicious PDF — malware analysis report

Static analysis result for SHA-256 254e69bbc50fadb7…

MALICIOUS

PDF

84.8 KB Created: 2021-09-02 09:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 76d40189e32ad1c857d770f7769e3865 SHA-1: c3c4134dc4230d0d0aca14fe50218fcc66cbf16a SHA-256: 254e69bbc50fadb7a699223d8ecc52d8e01d243196cb5f04c9505dd99183d16e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains an embedded JavaScript stream and a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting. The primary attack pattern appears to be a phishing lure, leveraging a link farm to redirect users to potentially malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=how+to+breed+for+perfect+ivs+sword+and+shield PDF link annotation
    • http://toptoptraining.ru/img/upload/file/79424147194.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/jexokumajonubujubi.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090135ea2555---80462429157.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077a97a8fd8e---mojinedofonibadozimiwu.pdfIn PDF document text
    • http://baobiachau.com/luutru/files/8585333443.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/acfdf2b206d12e18fd36164150e2cdd6/mimukel.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/jqlqvdmq6e98bh2kggh3jqibrq/41612917248.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a483fd8e70e---73763369700.pdfIn PDF document text
    • https://chp-travel.ir/data/file/voraredotimadur.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/niloligexenebubegeroga.pdfIn PDF document text
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/99712985753.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/60152735815.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/xebamofov.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d45b2d4b55---82831117674.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/m9vdk3oqvpd5paijkl8ra2a232/tulonajijusa.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/9a101e64c9f72f6a250a1344a5378d57/gilipud.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/97310100367.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/xuxejipijalesepugotebu.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/91030167795.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/zixatigisas.pdfIn PDF document text
    • https://sthouseluxury.com/upload/files/68876191674.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3b26864d1641bbac29cf8619c3eac330/vukozifopizexevadi.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/76505521956.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_off0000e431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE431 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC43 17696 bytes
SHA-256: cf9f77db4893d04e8df0204eb02a693c9e8f589bc312c9909654d0bbcc1cae02
font_02_sfnt_off000129e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E0 11000 bytes
SHA-256: 9fe4450cec8f6c465b69549ae83cfe71cfcb0e6d25d4ddd832c80202453c4e5b