Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e683bf188224a55…

MALICIOUS

PDF

139.6 KB Created: 2021-07-25 00:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 363405df84c691d44bb664d6cf6694fa SHA-1: 6cb8a73098a2492b3663e626c9d05332deda1021 SHA-256: 8e683bf188224a558745ea58b59e77cfbddb6edb7e36c258ffdd6ad61c5b3bd3
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. These links are likely intended to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://perfecthospitals.org/FCKeditor/file/vesupubokowavovajanebe.pdf In PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c77b34289f1---4656504901.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/635glhric7llqadqqh36a0ovv8/kejenarara.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/26487466722.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/29217386875.pdfIn PDF document text
    • http://ponyomaru.com/files/files/durofekasujotefud.pdfIn PDF document text
    • http://katachizu.com/img/news/files/lozavuzuxedasi.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///33790006978.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/nemevowusozuf.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089802b3fea0---gomijogepuv.pdfIn PDF document text
    • http://firegallery.ru/img/upload/1534722742.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/1669fb638a7a2c94a83f5c44680ee1a1/zututerokugabuzelebi.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/52e5c5761aa5148667f285e5dd1afc46/82644123455.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e38d84e19f---lejomi.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/vojitefivam.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/9426830043.pdfIn PDF document text
    • http://foto-video.ch/userfiles/files/8102222351.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/55685093266.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160778125a7fdc---neliporajijajetemav.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/davagovamolu.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/12339408134.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d850c45178---redemozafuzuzoviku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=norton+anthology+of+world+literature+3rd+edition+volume+d+e+fPDF 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_off0001bc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC1E 18704 bytes
SHA-256: efde48e085a34c1e46dbaa029f2077a91dd7411f00c2d7890078f25e55b328c6
font_01_sfnt_off0001eddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000205f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x205F6 11148 bytes
SHA-256: 598eab871e5df2c133f2520a9541f1bd60faaa1878c427e0c4172f428650e302

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