Malicious PDF — malware analysis report

Static analysis result for SHA-256 62deac800833fa62…

MALICIOUS

PDF

75.4 KB Created: 2021-09-19 22:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 333acbf1613d0f41b713e734b9943997 SHA-1: 4dbe422909ec0e49c27e730c8eff3484940a86b8 SHA-256: 62deac800833fa624b4c8f1776d4531c56f2e890a68b8432b45d6bdc1fbc561e
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://drafthe.ru/uplcv?utm_term=con+air+streaming PDF link annotation
    • http://toszegisuli.hu/userfiles/file/vivob.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/zotugepesaf.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/satonobumezubitudixokuta.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/4919303301.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/48039372814.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613454ec79f61---51613799182.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/sopijaligumetirujorepan.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/20621072865.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/47529626022.pdfIn PDF document text
    • https://best-label.com/upload/files/tamozazesoxolabopowava.pdfIn PDF document text
    • http://t-cso.com/upload/file_folder/file/86285515310.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/fakuwilugoputeso.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/2953295369.pdfIn PDF document text
    • http://sudeoksa.net/userfiles/file/20210902180531.pdfIn PDF document text
    • https://ms02bet.net/contents/files/32337976978.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8f340539d---62148701093.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/zofumokuvek.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/71340542726.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/627b20e610012fff5c81e89405b333eb/limekijotumo.pdfIn PDF document text
    • http://hzaidele.com/images/upload/File/58323718722.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/kegesalolebolanoxiganu.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/35752124404.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614423f80d51f---62895575993.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/16513274289.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/dibaxigokelujulemor.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/f602be8a2142c332e2b2af1e7f0f25cd/zodonewanurotinok.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_off0000c502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC502 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 17012 bytes
SHA-256: 552414482defa45fb54aefe4bf85dbbeb75a7a1431011c0d43d2b20259ff6863
font_02_sfnt_off00010891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10891 10436 bytes
SHA-256: 35ffe4806f887f026d8eb70a8bacdc292417c32647077b1e2af55b0911feb77c

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