Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2a8b4463211d2b…

MALICIOUS

PDF

78.4 KB Created: 2021-09-13 16:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 95de30527d6f44f3088acf62d1ebf3c9 SHA-1: 552df09cb2c95aa405d03ace4887db9f5e342859 SHA-256: ba2a8b4463211d2bdc462b649382ecf4b35d8b5b0343410632a30083e9c46e83
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to assess the attack pattern.

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://queure.ru/uplcv?utm_term=romania+tv+direct+apk+download PDF link annotation
    • http://trans-serwis.com/userfiles/file/burexuzoluzeparidunu.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/retotik.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/48140328678.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/ihth8hjuls1lhju5glbppo6otk/73309327340.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/xumumavinerowelubo.pdfIn PDF document text
    • http://ozdermusavirlik.net/userfiles/file/dolek.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/14672476475.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/lesopewaborifibed.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/72080183212.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/90961655157.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/99920878484.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161301bfcdb4db---76834187511.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/pezisibur.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/97153173461.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/feramixipaboj.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/kusupibexaxazovejili.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135233cea1a7---kozifekeloga.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/doxoromoped.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51180292092.pdfIn PDF document text
    • https://digireg.es/upload/jozaweneselawa.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/pelem.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/62460994015.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/75243841509.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/rewuruvubisugumikeke.pdfIn PDF document text
    • https://halead.com/uploadfile/1630818048.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_off0000c7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF3 19840 bytes
SHA-256: f03e1927f4210963b14c24c477936099c2813222ec44f9d16d3ffd636378f330
font_02_sfnt_off00011323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11323 10796 bytes
SHA-256: 571bdfeb44e8bdfa6ab3683e348fc20c58522641d193a6e747a511b15a9c5d39

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