Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02a416ec83edcad…

MALICIOUS

PDF

93.3 KB Created: 2021-09-05 08:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 960e3f5c2c5c581cb75f523d2aaeb1b6 SHA-1: 3811f421557c4243f6b9e936e746f76f89d4e016 SHA-256: b02a416ec83edcad44bd78feed5caa6215d03631e1676c890fbf36890c5b3142
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites and link farms, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pistant.ru/uplcv?utm_term=bonfiglioli+catalogue+pdf PDF link annotation
    • https://giritrademark.com/content_files/files/10462323241.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/18698340160.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/fevafezelon.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/eh553b3p460dbag00fovvc1fh5/wazoxibu.pdfIn PDF document text
    • http://thebranchoflife.org/clients/3/37/37a84c4c47f147f839b5d5a44bb1b86c/File/wevetunamijopatadugamuvur.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/84854880123.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/renipawewasufoxopo.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f35f0ea8f---jinawavuruziwasilajajor.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774d9d4d0db---xazajireboviwomoxizinepal.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/3392065060.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/32052089536.pdfIn PDF document text
    • http://toonesk.com/upload/66594575221.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f2b4cc130e5---fonedozadij.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/6e2lor1bgtj242f9oev7eqivhm/57465563619.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd26b7af7d---40297092219.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/kokitikibez.pdfIn PDF document text
    • http://tktravel.shop/FileData/ckfinder/files/20210615_5BFC9227C5886170.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609912f4db697---dinexana.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e0df1680ef1---13507919181.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/bamesikefotironokawewoveg.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/poladumituvedepep.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942119bff85---vejidanepif.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/38382165819.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/46472798688.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/56ec7d05c2e1df5e5aad05acdd58e933/38593053006.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_off0001061f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 18644 bytes
SHA-256: cd3211f5ca8e8702fe027646c2e8bd3c69c479b8ab0df147d50e89d832004f3c
font_01_sfnt_off0001368a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA1 10680 bytes
SHA-256: f70e3761d422e1f14afe4aac175c5cea14444a7e373baaa935a2f45244f94f61

Open this report in the interactive analyzer, or submit your own file for analysis.