Malicious PDF — malware analysis report

Static analysis result for SHA-256 c096de15befaf12a…

MALICIOUS

PDF

86.9 KB Created: 2021-07-23 14:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e7d7e47ef20fd2b4b939eb61f36367fa SHA-1: d5ac3192b29ad6ce73dd8277eae7dad5c9a9f245 SHA-256: c096de15befaf12a4853857ddd2570fc8684389cf4305f9f8aa220a64d10ece3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm or redirection scheme. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://mondoacquapiscine.com/userfiles/files/70229410366.pdf In PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/73f7380fb48e0b6fe5b70f1b0a564d7a/83494062637.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/36aa3356b3580b34591dafbafda513b0/57292374806.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/vemamoxifazob.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a14c4b4af18---85646574290.pdfIn PDF document text
    • http://abnicum.com/files/file/sopowokekanin.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160acb9bc07a1d---xuvegimaridejegasesoki.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/2283643683.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106280947008057.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/71922817051.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/9e2133bc1e9a7531fe771b6e97068bd7/merigukoz.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608780a173397---gajefoxanajupimuliluk.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/13513515433.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/21422388643.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/27597233579.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7ecf4cc54---20572899088.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c67636ce5---lupipedalipozukemezudigi.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/tikudux.pdfIn PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/xivifakip.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/pupovifimimoxor.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160d31f0a76321---watadunam.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eedd28834c---wedazajesegapexo.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/puzufaxuzipixirusagevag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+do+i+get+my+xfinity+remote+to+control+my+tv+volumePDF 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_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 17112 bytes
SHA-256: 8ac015fdd0220616e3c4c95918f384b63be19940f3415bb36fc8ab17f80310c8
font_01_sfnt_off00011bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13414 10948 bytes
SHA-256: aed566fa452d4690e7dcf57f88d157e50393a8321f06222e9895771f9bfdd0b9

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