Malicious PDF — malware analysis report

Static analysis result for SHA-256 693e1a199ca3a934…

MALICIOUS

PDF

112.4 KB Created: 2021-07-23 07:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2fa191fa618b31ee0e9f9e1b6ee372a6 SHA-1: d407b94b0e50eadb39bf4aef2c750724cb0d6f39 SHA-256: 693e1a199ca3a934d3750f86d3f9fc13b346cce89efd537e9e062ae0b8178142
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites acting as hosting for further PDF documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the link farm heuristic and URL analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/qmmc8hr9smevmfo2mhbb5ipkd6/dimufiw.pdf In PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607688934a002---tepaxotigo.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ad4150db4---69262834181.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/59950594378.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/besovotokaxitelo.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/85149726383.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc1a87cd7f---mepagumeruxipepaxatixapo.pdfIn PDF document text
    • http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/28294664530.pdfIn PDF document text
    • http://srhs1980.com/clients/877094/File/pezibepezazituw.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/kunemodemopipuxo.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210512172127_1239096289.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9972a46c3---84407991563.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/10e99b9fe73a8837d249dcd92db2e209/gezoxotidivenewaf.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079356341a1e---xofufunesuluzaroz.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/99030252372.pdfIn PDF document text
    • https://giasusinhvien.net/upload/files/12948842297.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210625_D1CE6EB2C7DEADB7.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2c6fcfa01---wezetawu.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094afad4e379---biwes.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/60797565096.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/91196773533.pdfIn PDF document text
    • https://subarini.ro/mm/file/29744086658.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/nenotutewo.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/91d95a9f893f652b952333c9c27c7a83/6208097302.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=for+honor+parry+light+attacksPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14509 18748 bytes
SHA-256: a63c666a3185b5554cd97fb6d7ed2fea2f235b56d3fe14d5fe86514d2339969b
font_01_sfnt_off00017691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17691 10704 bytes
SHA-256: 33f3b7580648cbbd4f60fced4e47b02cd21d74d5027fc6f1bf9052086176df42
font_02_sfnt_off00018f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F07 2144 bytes
SHA-256: 950e7ca5967a73f7b08896c696fbaad8542e609a0f41f03be7de5855f3e6fdb0
font_03_sfnt_off000198c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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