Malicious PDF — malware analysis report

Static analysis result for SHA-256 d299d8cdcefd9eec…

MALICIOUS

PDF

179.2 KB Created: 2021-08-05 23:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0efa037263143006656cdfea77465cc8 SHA-1: aa0e627a589499a0045f6fff3c6920c0aa8d37e6 SHA-256: d299d8cdcefd9eec2ddcc6c8306ba31a2285cba64ad50e1fea758d02c084ce1d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a phishing lure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely contains instructions to decrypt a password-protected archive, a common tactic to evade security controls. Several URLs point to compromised CMS uploads or disposable hosting, suggesting a distribution infrastructure for malicious content. No scripts were extracted, but the overall pattern suggests a phishing attempt designed to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8744

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://zavalinka.by/var/upload/file/monujixewidulezesot.pdf In PDF document text
    • https://bisnismedsos.com/userfiles/file/wikuzozokevodomowit.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/50657054305.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aaeb38944---25858662948.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/disigiralujevologe.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/37280791320.pdfIn PDF document text
    • http://tyextractor.com/d/files/zozevanegovakowewaxov.pdfIn PDF document text
    • http://e-sportis.com/images/upload/9539285302.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/74510449344.pdfIn PDF document text
    • https://scanclean.bg/upload/ckfinder/files/bopes.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/gututunikadipije.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/netagewakolekolureno.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/mugobikojemaje.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/81605212524.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1610939d38b74d---simovapovomexejivogosuzu.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/48301285655.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd28b2440a0---zedojupewifura.pdfIn PDF document text
    • http://benetalent.com/upload/files/kabubapuditegiw.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f63d5cc10---54928756973.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/66337719758.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/36216582098.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/wixizimugura.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a38aad03539c2628627a945485fc4d92/takedafaxogiwexinuno.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/finuziwezuxom.pdfIn PDF document text
    • https://scanclean.bg/upload/ckfinder/files/vanazuzolaxulebanozin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=docker+compose+version+3.8+unsupportedPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23140 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00024957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24957 11172 bytes
SHA-256: cc988c4ccb0a9fe0ed224d2d5b04f75de886de4205f08de4c9dcdaa59b390d00
font_02_sfnt_off00026384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26384 18592 bytes
SHA-256: a80f657b38e92b5b490b2dbe094ba463707d4b30f67615a613f23699c9a135ca
font_03_sfnt_off000294dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x294DD 16412 bytes
SHA-256: 61c605be372d07d1ac606b43f82703b3d830b576455162f453030b3eef3d97b1

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