Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc8684c944e2ac2…

MALICIOUS

PDF

94.1 KB Created: 2021-09-18 16:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 6f3867b101562b0865fb3087a98fa964 SHA-1: f45f5b1fd451b5460e04df2be1fcbd40589a6643 SHA-256: cbc8684c944e2ac23e9f2a45bb6967ca2caca09f88f87ab39be472498d81bb5c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely contains instructions to open a password-protected archive, a common technique to evade security filters. Numerous URLs were extracted, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm used for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/42175047557.pdf In PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/44721428934.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-12/20210912190542637552.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/ca3labe4ktoufm92ob70ng5if0j0hcge/12477741629.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/91053736141.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/pijusalezituxo.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/77359143982.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/29352741752.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ede887f33c---moveg.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/nukikovixus.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/35792511964.pdfIn PDF document text
    • https://medpressa.ru/files/file/76547711066.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/pifirovekemi.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/movomowaxezagugusin.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/84091181004.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/97902842491.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84978827577.pdfIn PDF document text
    • http://airfa.it/userfiles/file/jurase.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/faxoza.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/kegurosonitapujama.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/83d0abaf34b26bf88ee87328a2b6dd09/fevonuzojagalitegopo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=aapt+android+studioPDF 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_off00010a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1D 18932 bytes
SHA-256: 9291c00d34356dcdfc3fbf3d1dea5ac3ad498305b77ecf09d779c595890a2ee3
font_01_sfnt_off00013be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15400 10288 bytes
SHA-256: 263a2164e5ff842d7e949de5d7efee02fd51a440fc7384220786d15d1e043efe

Open this report in the interactive analyzer, or submit your own file for analysis.