Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09fc223d9ae123a…

MALICIOUS

PDF

72.1 KB Created: 2021-08-28 19:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a4872aba0c65ba5693edd9b8929d5361 SHA-1: a4f34f56fc89b001595a08a99a0f285b8e670228 SHA-256: f09fc223d9ae123a01aa9477f026d5e32811c974237201226e389e65d1ad4c3a
196 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external sites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides a password to decrypt a malicious archive, a common technique to bypass gateway security. No scripts were extracted, but the overall structure points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://smn1970.com/clients/d/d4/d44d2684521ac238e4bdef02d06179b0/File/50688507089.pdf In PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16121ba0708850---59220391882.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/wejunaxowuwizemusamuz.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/30443279238.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/sigirekulozomanimif.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/jedepezebu.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/73507811780.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/daramosap.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/4r27qfilstan5f0h9ticv53u98/penogowigosajimovusenu.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607243da2fca8---7624171719.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/bexisixolesilotedigal.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/3c60ac0feaa137ecd3bacb722057a5b7/15498619024.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/29217386875.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/zatujaxalabavijefimuma.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/55918438975.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/hfohckbl5b3nfv6ioads7io9n0/nusadun.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/kadijebopitevawagawizujeb.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/85150602260.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/liwajosuritegavirez.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/68288741613.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/32bea64611d22ae494b5da89203ce27d/91879559050.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/piwojugozuludofezarisu.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d26d019f9---debiwudemegifuzazupevul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=ciel+and+undertakerPDF 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_off0000b97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97A 16268 bytes
SHA-256: a92ed770d6ec6ec7ab7d8820add5b945e577daad6e02078ba408952978f03dac
font_01_sfnt_off0000e315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE315 10176 bytes
SHA-256: 03ecc2b3801ab1c88ec08c21c051fa70456826c9d3b5cb8f0eab3dcec7ed3bf7
font_02_sfnt_off0000f9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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