Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04f2cf2f397c957…

MALICIOUS

PDF

78.4 KB Created: 2021-09-24 10:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 554bd8750cc587ede84725685ffbc396 SHA-1: 252b95dbe2763f423d89c8bce1012175e6fcc5f7 SHA-256: e04f2cf2f397c95707dc656907ee899717026d6a59fd0486944d83a23bb8d11e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent. While no scripts were extracted, the document's structure and embedded links indicate it's designed to lead users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://infrive.ru/uplcv?utm_term=android+bluetooth+multiple+speakers PDF link annotation
    • https://arichaindia.com/userfiles/file/69460359376.pdfIn PDF document text
    • http://kustari.net/userfiles/file/82563027288.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/49156062902.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/titemegol.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/geviletezof.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/9166554067.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/pizizujupuxelefupo.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/97077391067.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/vipatijajowodepigireki.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/22923742348.pdfIn PDF document text
    • http://omni-links-europe.com/images/blog/file/59856686613.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/subogawivobisiwekabejut.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614c3283d2bb3---45402412260.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/88654590739.pdfIn PDF document text
    • https://adurucui.com/ckfinder/files/kogupanetemib.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/nimenuba.pdfIn PDF document text
    • https://camelcarpet.org/d/files/pokagexukavugisodusa.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/67273064511.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/jezezegigo.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/31139238282.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/womobumetafemumamalinefeg.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/nifosula.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/91898172052.pdfIn PDF document text
    • 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_off0000cd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 10968 bytes
SHA-256: c0d7803df2a46f35dbb0c0c82f1b464498140ab7222aa58480adf4430520de45
font_02_sfnt_off0000fea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 17480 bytes
SHA-256: 969f63618d6f9d8f1b4f682b56a56eb4c119ed88697ac2819cfbf174ba24492f

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