Malicious PDF — malware analysis report

Static analysis result for SHA-256 c444c12c1b08e341…

MALICIOUS

PDF

102.2 KB Created: 2021-07-04 06:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 06aadc4ad60e4d00267444c6bef5e3ca SHA-1: c2b83416886b92a1bad21fcaa53da5e24f52c2a1 SHA-256: c444c12c1b08e341f8dbc692a129222349ff672f34e0dc5043e3fbb0ba48b9ef
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to websites hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The embedded URLs point to various domains, many of which appear to be part of a link farm designed to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d8d63d1e701934bcb08546bdec7dafa0/43180119112.pdf In PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e42a854433---81932149260.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/rimumofesoligujatabokobud.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/rlb785vusmsa7kesll6top3p07/meborusidemofin.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/a6af2ae0ffc4c56365107fd9b7147577/zegolejagebiruw.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0f3b401b8---93478197483.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3441ac507---lutugezadazerivufikow.pdfIn PDF document text
    • http://ahchala.com/img/file/16212699523.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816d32dccc8---10461688702.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16071634c36899---golimufu.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b0bfde095---xuvusosoxagaxanopipalatol.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e013158ef63---dulojeresasuwevej.pdfIn PDF document text
    • https://pindimana.in/uploads/file/ximegelufadamuba.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/15cb089e0538d87ab326d48fba4d9785/boxuganavevobisibepejino.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/meramemefoxot.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/57059534146.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/fetevedazigivorumapo.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/esv341bmi4rorq7bjfoa48mq83/88233204414.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a65b9867b73---wamuguwalibusimufodefana.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608098c765f6c---13116717819.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210630_0DFBB707653EED0B.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc6e293721---97177462190.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/gonudavolefaresab.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/25158bc6fed2a9650e1d9d36e688c308/zifetarololeri.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/32455423035.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=perfect+squares+tablePDF 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_off00012aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA3 10400 bytes
SHA-256: 976ac2d4e5b537a95b24742fc9376e217f3cfa312963cdf9bb20c8ef2d7fc838
font_01_sfnt_off00014262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14262 18288 bytes
SHA-256: 1596e5384ed7490f57f4d488437da83a90f3cfb8484d1a3c342b8fe7bd9b2f13
font_02_sfnt_off00017214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17214 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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