Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63a207d85edd200…

MALICIOUS

PDF

88.2 KB Created: 2021-06-27 03:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68710bfd86f50ef837eda344fd19583b SHA-1: a3598e0b5782faadae0093417d94a4497bbd6ad4 SHA-256: f63a207d85edd200886dc39a38d6ec70a33492346d19b0dccffa6c1c3de3f66c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites and serve further PDF payloads. The presence of numerous links on disposable or compromised hosting suggests an attempt to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://alituncer.com/userfiles/file/lipago.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/5cd9984a4370ddb05cd007ac249a8d40/vosigew.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee6145f671---49488415717.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/acdafb93eb69be77bab5e3626481b30e/sosuvisik.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210619140803.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/79ab18ebe509fe31346b7a9c382f3a60/15739606629.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c89e54985---wimipekagaboxatowo.pdf
    • https://sofupingame.com/calisma2/files/uploads/56602757011.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a936d33b3e---85342702297.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099014c6e4a3---boruzivapi.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/32694313757.pdf
    • https://greenvalleykerala.com/ckfinder/userfiles/files/3702188144.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16073bb557bd7a---23929786756.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e47566ebc7---28503221187.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a3902af53---wotug.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3204e06d3---65009974961.pdf
    • http://ttc-investco.com/img/files/ralabutolaxajilate.pdf
    • http://yule-sign.com/upload/editor/file/20210615183106.pdf
    • https://weeb.nu/userfiles/file/boxironixoxata.pdf
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/um86u6pihken5rapabhdgdq36t/63371869530.pdf
    • http://casier-a-bouteilles.com/file/12029945982.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607069d66e169---80447512243.pdf
    • http://francescofesta.it/userfiles/files/85611432672.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/24c0ff0240c25bb146cb3e693b6472a1/gupopagel.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=list+of+low+glycemic+foods+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5a5.bin
555f4d004bf70451f5aa9274d441a10ee3d4b35da3b96fc94cfb7cc6abe2463c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 17688 bytes
font_01_sfnt_off000123d8.bin
8a8bee28ff65cf980f25925a43a203168078a9bfd07c0ba755b70e5a4091d6c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D8 10752 bytes
font_02_sfnt_off00013c81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C81 16792 bytes

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