Malicious PDF — malware analysis report

Static analysis result for SHA-256 e583b44265b741af…

MALICIOUS

PDF

92.0 KB Created: 2021-08-04 14:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 07f5e24e7caa33e0fa8ab3dcbab5774c SHA-1: 93b3b7c24d4ef2f819b2918d4afb44616230a9e4 SHA-256: e583b44265b741afc5b14c7e3a3880f6c602d99c5bf3781bc29bf1d28f09ce31
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The primary function appears to be redirecting users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/k16ubfk33dbotcg5122k83q5b2/katise.pdf In PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608823e8764b3---17549883290.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/mirat.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/fajodavimoxuganapo.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/2429524ffa57b28cef0ebd6baa1b12fe/58369495578.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/delugunubuvim.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/48978807554.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/bubagiped.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/gawezisar.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/b96b5d58f4920ddaf5062a836240b822/nizakemuripubutazis.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/59bae48fad8bd1849b73bf8be2ab2cdd/zokexugezexapesesuraluf.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/nfhn0tbvme90vomisnl5tt6pgi/barulelozi.pdfIn PDF document text
    • http://adlinefor.com/home/webagen/public_html/korn/data/file/wipilifiz.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/forokap.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/jatixuripezenikexivuzef.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/96443604209.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d1e4ab596---mexitafafid.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/deferetuzuwoxajofifu.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/41737938752.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/8558060331.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903172a5f24---93418597849.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160923733c6d79---6484400155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+support+a+eucalyptus+treePDF 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_off000104c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C8 17500 bytes
SHA-256: 366ea6812a4e9605108b9c7fb3915cfa58364bccc09177d2df2eec40723f5bb9
font_01_sfnt_off0001324c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A63 10460 bytes
SHA-256: d22b288b43540e0a3febdc3b76d7b3684f56d4769d5c2544cbd4b1bd8e025c61

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