Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b47316539fb4ae…

MALICIOUS

PDF

87.2 KB Created: 2021-08-03 01:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dee4476b91173afbcf452e2162b7d353 SHA-1: 044221193da209d1dff14352575de7cf96c4752c SHA-256: 09b47316539fb4ae2d047582d70b452648bca05be621bf620dbf9c4c95cad25c
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on disposable infrastructure or compromised CMS uploads, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of external URIs and link farms points towards a spearphishing attachment delivery vector, potentially leading to client execution via exploited vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105010002337931.pdf In PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/arq9pf60kdfs4olq6f588abgnh/63644199875.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/91136621299.pdfIn PDF document text
    • http://dejede.com/userfiles/file/xulimawijipane.pdfIn PDF document text
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/24367198267.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/52ti400q46mopol855baepjt7q/94819335667.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4d7a7134030c090d0002e90c2170a9c8/vaxanokawirakenekise.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/c5mrblkfomuflag4fi00kb4338/vifixogejive.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609063f4c000b---86173722172.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8d89df2570ff3d51bfbd5b52389b3b37/54238105257.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/2d1d6ad70b73aa6a17f4aa880e341c77/bokunadev.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/bojavuruwefupabunakepa.pdfIn PDF document text
    • https://agatanorek.com/files/file/79125745353.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/02862c6af72ecd422bc5d69bf1abe475/papif.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/5febb504a730af001907412be29cf8b1/tafedevedujuxirekidonokol.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/mekiwozapumenizukasurimap.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/26967590715.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/ro3u93pm9fu2qtdsta7stm35mh/2411107298.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2fc576cb2---guwawunolunenozug.pdfIn PDF document text
    • http://teraval.cz/res/file/xelikokeluxi.pdfIn PDF document text
    • http://www.heksan.com.pl/file/kinekebixuwupuwofisu.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cad3cb9c93---bumanodebakozujixis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=active+and+passive+voice+in+present+progressive+tensePDF 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_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FA 10692 bytes
SHA-256: 2d9adfb01216930ac579a094d44e27eb3b1f8ec4497c55f12cebfe0e46a6c733
font_02_sfnt_off0001207d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207D 17028 bytes
SHA-256: 4240cf253adee1458c0763a04c7beb1f24298f46346b1bf88c8350240e6879d7

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