Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2db7e9a3cb8222b…

MALICIOUS

PDF

83.9 KB Created: 2021-07-08 08:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 514cd71332442503ba1465fc5f29bb6e SHA-1: 8080c626ce65d0850ea000513d54a1db3fda492f SHA-256: b2db7e9a3cb8222b86e6bdd1a429f4e1aaa081c3d99856982afc6bbd0adbd05a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external websites, with several links pointing to compromised WordPress upload directories. The primary attack pattern involves luring users to potentially malicious sites through a series of embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://kaupa.cz/userfiles/file/73454030619.pdf In PDF document text
    • http://musikpark-live.de/userfiles/file/tamoz.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/24045508022.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/40799037991ffb6ffdd52274ed12cbde/70923375901.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/501263eb7df1e974818ec2db7642f8f3/fuxaxuperuw.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/90645489953.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/54587dc990b49748f3f290e7b35d189b/funuzele.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/349de0275ba2154180b7300a375abd97/defewixuzaxivudizidox.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/nc0boo59rkijol8ita4lkbhh8b/kujipobarodiliguxizaw.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607002147d5d5---21120630069.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/todifamamilo.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/89605416264.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a30407e8953---66703747560.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/47586554929.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c92e0dbdb41---jarile.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/5579d407cc91635bcf818fdeb5f76c9c/57405457787.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/xazoxuvokitib.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/97894758006.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/38441295196.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/30c842f14af5ac465b8d26360db7237d/2782381075.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/77427140987.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/l5cki3kd262337577ngb619df4/nilabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=valuing+intangible+assetsPDF link annotation
    • 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_off0000e55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD73 10272 bytes
SHA-256: e511a170794ee1fb86ca6f4b320e6b640c5a5ca2089767b332d15b3b520cf1e4
font_02_sfnt_off000114ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AC 17440 bytes
SHA-256: 3d98563e49fd60a3b217675b4684fa9b70ca4abde053d6cd837b23fc0352b2f0

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