Malicious PDF — malware analysis report

Static analysis result for SHA-256 60af54742ba86b95…

MALICIOUS

PDF

67.6 KB Created: 2021-09-26 18:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6d94c3112b6617a5edb9d2a35acb26e8 SHA-1: bf696931f41e4309f7ac2639a2474368531059d6 SHA-256: 60af54742ba86b9514daf36d0e3e93726633266941011da7a3f93cd42f6e756e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by ClamAV as a phishing trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is part of a link farm designed to obscure the true destination, likely a phishing site or malware download. No scripts were extracted, but the overall structure and URL patterns suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://ritadas.in/userfiles/file/29822965511.pdf In PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/67298603419.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/fenojujijuxaridobob.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/43938401661.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/87048169570.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/80678232830.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/bofapa.pdfIn PDF document text
    • http://ellev.fr/upload/files/75627735507.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef7c9ef676---81133801165.pdfIn PDF document text
    • https://kawanmto.com/contents/files/bedaf.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/figinur.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/73647290169.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16132563230ffb---65803574128.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/16047981821.pdfIn PDF document text
    • https://polytex.de/sites/default/files/zexajivubemiketerag.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/sukawibotep.pdfIn PDF document text
    • http://hoya889.com/upfile/files/20210918221455.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/bajosalovazosoki.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/28163817232.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/juzeroz.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210914080916.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=freddy+2+download+freePDF 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_off0000ab57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB57 15168 bytes
SHA-256: aacd270944197cabe85dc484987825e62ce418a4d382523e3abc8ab88768825b
font_01_sfnt_off0000d1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E7 10288 bytes
SHA-256: 74aea401b00bd4f97ccf0286fa088db3b44055e8bdf7e269ca22cedc2cb16461
font_02_sfnt_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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