Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3f2ca929ab34b7…

MALICIOUS

PDF

71.5 KB Created: 2021-09-26 21:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dd6432e05a77b8be81bc7753dd154e6d SHA-1: 5dc65aa07afeaad8b28009a2a548bf88ef184611 SHA-256: 9c3f2ca929ab34b7e4069d97a7cad9b87ab0e61ff3473ce61a464ff1358120c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of 'utm_term=download+mugen+for+android' in one URL suggests a potential lure for users seeking specific software, which could be a phishing or malware distribution tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://nomylo.ru/uplcv?utm_term=download+mugen+for+android PDF link annotation
    • http://dent-pro.cz/pic/file/nukumeburupotesexop.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/rezazoduwawegezikozof.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021090909084183.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebd80b9e75---vasanolapol.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/37708002056.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/56177793716.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b621bc5181---juwupatajogonepi.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/juvogufulusad.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149fb0219435---zevanebikatejeriwulifidi.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/45414945140.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/figebefupixaruda.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/65948526770.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/xufibubofubiwawasifiximu.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/49198812048.pdfIn PDF document text
    • http://fteq.ru/files/file/bagabanivuxafinodidevate.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/bbac01d68b58e061fd4f1268f6327fb9/16402133318.pdfIn PDF document text
    • https://andana.us/files/files/72295919032.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/8184260602.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/1524281225.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec5bc0623f---tomuv.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614649bc86788---99390457220.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1632504460.pdfIn PDF document text
    • https://actorconseil.com/files/file/fifoganifavavesukawu.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/norobavumidamofikevaguzi.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_off0000b4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD09 17148 bytes
SHA-256: c197824528931dd260338f253079a34456802fef6b39b3f32e8f5da6f8416cad
font_02_sfnt_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 10620 bytes
SHA-256: 42217bb3aa0a5975999dd64aa47ac245c66d10e6476d3a5716646a55b3d39343