Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a6e214f5c52307…

MALICIOUS

PDF

72.2 KB Created: 2021-09-11 09:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 31042c13e3a4569daf7ad2ffa2e3e25f SHA-1: ca36f050657aa4d94bfa3c3b451803afd311d8d2 SHA-256: 25a6e214f5c523079314729fcd638340227dd92d13aa4c786c010cc3a37acd8a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that redirect to external sites, suggesting a phishing or malware distribution scheme. The PDF structure and the presence of external URIs point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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://infrive.ru/uplcv?utm_term=hacked+apps+for+android+free+download PDF link annotation
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/c0a14616c190a87e79b9d527906df288/pukositabigi.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/pajupenemowazeso.pdfIn PDF document text
    • http://afslab.asia/upload/files/2118467997.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/97891338514.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/97746471978.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109080625038463.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/55299359178.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/pevam.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/fikowefapikenijijuxidula.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/bilafufataki.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130985f32877---36752080502.pdfIn PDF document text
    • http://4bx.pl/public/file/jipurodisazotasa.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/84365411394.pdfIn PDF document text
    • http://centromp.it/userfiles/files/83445335032.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/1902601869.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/39731983062.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/22401638328.pdfIn PDF document text
    • http://rigosarchitects.gr/userfiles/file/93298873280.pdfIn PDF document text
    • https://km2804.com/ckupload/files/29271664912.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/41747843954.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210903130739.pdfIn PDF document text
    • https://cargotavio.ru/files/file/kefiwozaver.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/jamapek.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_off0000b72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB72C 10684 bytes
SHA-256: f85c3768259a7d3e978f54ef449690d8c1e31199790c54e740b7875390ca65a4
font_01_sfnt_off0000cfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCC 16828 bytes
SHA-256: 288ebf897f6c8824f065d742eb53676f91a6d7a6603563af2184b3215cba635b
font_02_sfnt_off0000fb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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