Malicious PDF — malware analysis report

Static analysis result for SHA-256 056487614a264e52…

MALICIOUS

PDF

72.0 KB Created: 2021-09-16 00:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ab432d3dc833c0d46e724ac4fe4fd2cc SHA-1: 72e488889b10c4ed5f77cd7e90dd6c824954cfdf SHA-256: 056487614a264e5289c31db2166c3c618f45dca0d6206460231d8e5164f44b72
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The presence of PRC/3D content and ML classification strongly indicate malicious intent, likely for phishing or distributing further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=mobile+antivirus+apk PDF link annotation
    • https://coolinterier.sk/upload/files/gukoxipuvifadagebete.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87791535329.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/61987801713.pdfIn PDF document text
    • http://thevale.us/userimages/89338147040.pdfIn PDF document text
    • https://123natura.com/stockages/files/64480303384.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/21091521035151403960s48u.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/zaridonuvevopor.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/pawisiziwelel.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/33990963911.pdfIn PDF document text
    • https://kede.org/userfiles/file/63166381133.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/13384984901.pdfIn PDF document text
    • https://avenue102.com/uploads/file/61290744250.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/3035818620.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/21290767653.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c7dd600d4---97578563354.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/5906479451.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/98334656346.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/midafowoniji.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/33239157291.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d5358a3f6---78822677495.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_off0000b88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB88F 16516 bytes
SHA-256: 8a7e02a3212031715660c2e69f12c1ce4191368118259bfb5cf6980e82feecd3
font_01_sfnt_off0000e2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 10636 bytes
SHA-256: d9a559ba057c0e966ac9490170358943ea257026e9e95d8826f73af26080e6dc

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