Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e970c8a1d5b08f…

MALICIOUS

PDF

92.3 KB Created: 2021-06-11 10:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: eca01a62b6243c2bd8b16eade3b326c0 SHA-1: 9ddbe3fd1ee00f7119ac08f3d1e7bb4133fc9752 SHA-256: e9e970c8a1d5b08f984e98282d32a7f14ed0a3f58d425890f4e1b2cb1e00e054
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://allytemp.ru/uplcv?utm_term=pokemon+fire+red+gba+cheats PDF link annotation
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/l7sg1jui8t275jtkhosms7bdr6/mijused.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/depasuraxotawilokida.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ea6cd0165e6b56dad1538ae4e9cb71be/lojomekewezuw.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/pavezopokexovos.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/voxazo.pdfIn PDF document text
    • https://mszukam.pl/dat//file/25963505891.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/d164408cc7c5ebe43384801b553aad10/morujuwajukawa.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/f43a64acd1cd94c4f2ef32da23fc1fa4/jasot.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606eba8a73481---73564938343.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/mojep.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/warebelepibidu.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/be4e9f2996ceb57fac1fb19d9ddb1ac6/18912974302.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d73fa8d734c7ecc4b5b8e8117cf391e6/kegezokobelezodegozomolur.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/lebikak.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/033dd3f5fd6cf565f6227c2a9a75c6ed/birizuruwibepirilagipupu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12953 5608 bytes
SHA-256: 7cbef6b6fddfa2ef06db204974e4a836f48a66af03a381d50bb1570d9da8a54e
font_01_sfnt_off00013c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C44 11916 bytes
SHA-256: 4550e91777cb350499646278c9d3cfdeed431f4a48a59cb205588657d0dedbdc

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