Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d46384ab1423d22…

MALICIOUS

PDF

80.6 KB Created: 2021-09-17 02:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 60be608ae6b390a3df0cd34d68be8d07 SHA-1: b1ad1e16e6d13221dbb339ce79cf7ce0d02cf75c SHA-256: 9d46384ab1423d22acf98988f72a41066cc179216125ce5c7b7f27d7bb3bf118
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm, with numerous embedded URLs pointing to various domains. Heuristics indicate these links are on disposable hosting and some point to compromised CMS upload storage, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96228218515.pdf In PDF document text
    • http://studiofelician.com/userfiles/files/jukufaxikaripalovewikajo.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/zonunifofajebakudik.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/wizanuradabelugazemukel.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/lebazinifidiseka.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/napujogisipimofafikazuw.pdfIn PDF document text
    • https://coluer.ir/documents/file/11248274660.pdfIn PDF document text
    • http://rivucota.com/upload/files/16888698179.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/e56e292893f28c13bb11f0b7985c29fe/12786858505.pdfIn PDF document text
    • http://sunway.me/uploads/file/10115259349.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/63031742101.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16132b673757e0---65183902956.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/dosikodolagomoguleg.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/9131972709.pdfIn PDF document text
    • http://studioaeditecne.it/userfiles/file/45978691896.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///rejugavovarov.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210916005201.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb395cd0ae---8222876376.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/pelaz.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/23982522458.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///tuvid.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/68928826678.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/vedukil.pdfIn PDF document text
    • http://reichspfarrer.sk/file/48100494629.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/ponabavibasarokarubewap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=upload+apk+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_off0000d909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD909 17348 bytes
SHA-256: fc6e5ab5482c68ee9f33fa36898da4a3e7a6dbabf954976141706b549deddcdc
font_01_sfnt_off000105fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FC 10128 bytes
SHA-256: 561c2a8727fdcfc250003d46cb03130f2e6fa02cb893856f27adc1d98b48480f
font_02_sfnt_off00011cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1