Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9460ab43545eea5…

MALICIOUS

PDF

81.3 KB Created: 2021-09-12 15:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9b2bef6ea74d493f5e393d88473a9319 SHA-1: d63cea2ddd63f7535ab5caab5c266c249163447d SHA-256: e9460ab43545eea556135121a370e6177628cc20e35d54f8c944eef4665b23d8
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to disposable hosting and compromised CMS uploads, suggesting a phishing or malware distribution scheme. The embedded URLs and the nature of the heuristics strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://professional-tuner.at/uploaded/file/91815930672.pdf In PDF document text
    • https://fluffy-chins.com/images/file/ginizivegiporobu.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/16909903475.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109100710592540.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/viwufezonop.pdfIn PDF document text
    • https://beaszemin.com/files/xotojulololasulifuw.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/rupewoxotigoz.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16137669503f1b---69903784932.pdfIn PDF document text
    • https://profm.hu/files/file/29363213692.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/hcv0mj1vm4sbl2p45rtdm4ubmg/gofovaf.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/23332364050.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///96794069704.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/29715795696.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/juxudaletov.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316c3aef923---vinomubo.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/63637335662.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/2001313147.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210908_FFC3D11527E43580.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/35554529396.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/33293405982.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d63ea65fe9---35454188989.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/91560094648.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/menexowudolule.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/guzoriverudu.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/13044624109.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/miregebirinaxuzopogirigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=max+payne+3+apkPDF 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_off0000da2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23E 18012 bytes
SHA-256: 66f060d039b504f2962ae60ad9fa617fe484145888b092324e930434bc97d8c4
font_02_sfnt_off000120f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F2 10092 bytes
SHA-256: 73465fdeeb575d60cf06d703889c0e5f90fc21cc34956bf3907a03b0c26bb217