Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd65f0c1e4eab2dd…

MALICIOUS

PDF

87.0 KB Created: 2021-09-12 09:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7e69417df0a07458dd8a734583e43ee9 SHA-1: 6501cf8d60e70b941a35ec52aae59e76fdf3abef SHA-256: bd65f0c1e4eab2dd48b7a97558e6e89002960afcc086a9fdc42c8960c17ff289
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm and a callback phishing lure. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content or initiate fraudulent contact. The presence of numerous unknown-reputation URLs further supports a phishing or scam campaign.

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ephtour.com/FileData/ckfinder/files/20210912_2E4F49BA563F5599.pdf In PDF document text
    • http://gloteckr.com/upload/editor/file/62597335822.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/nifalitedeboraxajisoti.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/63769040849.pdfIn PDF document text
    • https://artenika.pl/fck/file/jovoximerabowesabuwo.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/80971991080.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/vamesudamapakotuwuv.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/64219549986.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/14956304816.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///8555302100.pdfIn PDF document text
    • https://lesrimaudieres.com/images/uploads/file/35952992301.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/93987152354.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/16527474573.pdfIn PDF document text
    • https://keongracun.org/contents/files/53963314728.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210904_160501.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/77523479697.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/vanudoxaxuseledape.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/77425683286.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d7aa67e92e07c532bace02e29f6c6529/67680353199.pdfIn PDF document text
    • http://vit-physio.de/file/11214013901.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/fobukoxipanap.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/radubafebakije.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/rulalefabofejapejibapux.pdfIn PDF document text
    • http://adurucui.com/ckfinder/files/63992081908.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=snapchat+dark+mode+android+release+datePDF 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_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 18500 bytes
SHA-256: db7c4f532c873eec4cd9bccfcc6a6beb3cd918b8f00ab513c5b940e3e3325856
font_01_sfnt_off00011d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D67 10948 bytes
SHA-256: c69e2d1a3e99d39bb27d7d330c90546e7ab98e0bd7c9c1166f3f1d0826efc4be
font_02_sfnt_off0001368c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1