Malicious PDF — malware analysis report

Static analysis result for SHA-256 188728cdb72830f5…

MALICIOUS

PDF

96.1 KB Created: 2021-08-13 16:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fb06bac7d142e1ce9028d591a116d43c SHA-1: bd93ab39a51ff06a1df3b1786090cbc93ab3bdb0 SHA-256: 188728cdb72830f50196b66f6087352db75418306b5eabaa3c251da7da22621c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to disposable hosting and are structured as a link farm. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive and provides a password, a common tactic to evade gateway scanning. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://miyozenemeryville.com/uploads/files/gatugaxubej.pdf In PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/kitiz.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/74361582325.pdfIn PDF document text
    • http://www.celso.org/download/soxiwaxop.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/romegapaselo.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/2937727802.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///zasoxufuvewis.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/96f0cebcaa91131bbe0aa2cf23a74efc/53604166806.pdfIn PDF document text
    • http://budka39.ru/files/14380662397.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/36658320618.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/44706278959.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/b854cb4ebbd07ad635352a65397ef63a/25997869850.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/fowerasukugijinevabo.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/161f4983d2c4db95026729977f47c673/12669513017.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e6c60d411---tamiwagirokigusuguxeni.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9e1d1fd0ab91e255e8a90d77436afbb6/lijem.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/6668ofna561k2f06riohmpp206/tepirejazabipuj.pdfIn PDF document text
    • https://melz-feu.ru/upload/12849827593.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1e35abc74---10222139262.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861d382c854---poredos.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/7ef745816d446c5d88bea35ba647bfcd/lopobopibajakuju.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/43427447886.pdfIn PDF document text
    • http://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/14012199300.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/333ee38559f5eb5d708095edddcca7e7/xelak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=los+puentes+de+madison+descargar+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10199 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A6 2768 bytes
SHA-256: 0971f5022e7d9333b576943a6d4247ef13dc5005e4cbace86bec309cf58355ff
font_02_sfnt_off00012519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12519 10976 bytes
SHA-256: f24d8c38fae54f393a5a5e800570763641e3044a78ee1ce258c65ce33f40241b
font_03_sfnt_off00013e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E59 19188 bytes
SHA-256: 536daa8d100b090c34f1f3b8a11fba8ebf67c414188f289d96680d54de95c9c0