Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e498841af46851f…

MALICIOUS

PDF

74.6 KB Created: 2021-09-05 21:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0e3c5b8af214be9263eb66721d05f182 SHA-1: 2bc4b89922bf755aff0cf2bea96d691d0b6bc319 SHA-256: 7e498841af46851f9d7dd27d1f35a9458056ff60a8af6d56063d75cc0b008112
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, with numerous URLs pointing to potentially compromised websites, including one hosted on a WordPress upload directory. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086af81afc29---45750706728.pdf In PDF document text
    • https://fedico.ca/upload/editor/file/26736856763.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/vofaperuko.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210803_F4DBE2455DE12387.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3999cd64a---givisuxujilakogovixafi.pdfIn PDF document text
    • http://dyweisheng.com/uploadfile/file/2021081000412173499.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/loxewigizepuvafowozef.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c18e5be85cf---23989929606.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/63840284899.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077f745c987b---bobetiripepujunurijip.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e43ee0752f---paranevifetipigajodox.pdfIn PDF document text
    • http://eubeer.vn/uploads/files/migewepubobolivexulegamin.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/25653762211.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/fuzop.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/012e68ac80bd87d808f2b030e530694f/91385227646.pdfIn PDF document text
    • https://btegypt.comfile/goxamol.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/38481819709.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e3f6154f7e23544e875fbc66203b1005/wapelafivaduxofariniz.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/7370310919.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/mimerezizenogavila.pdfIn PDF document text
    • http://geasit.it/userfiles/files/2530452500.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bebc6e0bb---xanumotexuza.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6843dbd8f79aed30c5c88bdc7128c855/nofibugejafezidotiwifam.pdfIn PDF document text
    • https://trisyscom.com/userfiles/file/43825842187.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/44721806563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=world+8+ball+rules+pdfPDF 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_off0000c100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC100 17056 bytes
SHA-256: 8359441ea5148c20b11c2e2fdb0e9859108ebd5254ce828edc6101f651846406
font_01_sfnt_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 10636 bytes
SHA-256: 1f32e0cfa2f02c21b6eea3a146e58f1dff19f8d0f2dc59aab436d0bdd213f962
font_02_sfnt_off00010520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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