Malicious PDF — malware analysis report

Static analysis result for SHA-256 2701a03bc415022c…

MALICIOUS

PDF

88.1 KB Created: 2021-09-17 10:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ebb5beb692ad8c5a78914d48ca58033a SHA-1: 8cd61e66d6b9b9664785d94c9b08624aa29a2163 SHA-256: 2701a03bc415022c4624c261c02b8568c4621726301de1be91016853a4206881
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links to external domains, many of which appear to be compromised upload directories or disposable hosting, suggesting an attempt to host malicious content or conduct phishing. The presence of a QR code lure heuristic further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=qr+code+beyblade+burst+valtryek PDF link annotation
    • https://bor-diing.com/upload/files/toxopajoze.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/zedekaxivepuvizizudo.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/38674218671.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/41029935194.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/tijirokuxuzufexajap.pdfIn PDF document text
    • https://wigs4less.net/nbloom/fckuploads/file/zoxogibavufe.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/7975341202.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/14184379193.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13582269463.pdfIn PDF document text
    • http://only-svet.ru/upload/files/88027144576.pdfIn PDF document text
    • https://fond.ru/userfiles/file/dikawifujedel.pdfIn PDF document text
    • https://makenie.com/upload/files/544045080.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/87715071278.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/80417770453.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/85019016929.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///pebedusedobezukoxenutu.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4cef12d04---vulukizokiwatoj.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3713c287b---10784073480.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/silesenoxizaruboto.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/pepene.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/60184642882.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/supupevokexozovuxo.pdfIn PDF document text
    • https://asken.as/bilder/file/3721444945.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/17497838070.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1a2fe469d---55474065771.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_off0000f1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DD 10736 bytes
SHA-256: e307e4424833e2c6148db5033afdca34c125f9ca40a9f9d30f622ca951d63187
font_02_sfnt_off000122d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D2 18236 bytes
SHA-256: f4da9fd1384098c55971f86778dfe18f7e9569e4ac0f02114cd6ff96cc5d2f72

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