Malicious PDF — malware analysis report

Static analysis result for SHA-256 96055e94ab1ad06e…

MALICIOUS

PDF

79.1 KB Created: 2021-03-20 13:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e09bdd77103019a5502c9b192a79b68 SHA-1: 5d759f19e9532e4ce42d79750c66db8812f5b2f5 SHA-256: 96055e94ab1ad06e4ed935b1bf00a42986d49f8df053011a9b109cbc4c7e3efe
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=words+that+starts+with+ha PDF link annotation
    • https://pidufemimin.weebly.com/uploads/1/3/6/0/136054052/welogizoletev_fujorituzi.pdfIn PDF document text
    • http://promooffer.site/133018302519qbwq.pdfIn PDF document text
    • https://bolukuja.weebly.com/uploads/1/3/0/7/130739437/xibezitu_zolino_rufasofukiroj.pdfIn PDF document text
    • https://nodejobirutita.weebly.com/uploads/1/3/4/7/134748641/kobabufonedukiwu.pdfIn PDF document text
    • https://tadilagene.weebly.com/uploads/1/3/1/3/131381422/c4a861f58c27f03.pdfIn PDF document text
    • http://oblakova.ru/free_online_interior_design_course_with_certificate_in_india17z56.pdfIn PDF document text
    • http://vinnipoh.fun/wadazasusavudojazyeybp.pdfIn PDF document text
    • http://extra-fon.ru/7954562850vhnv6.pdfIn PDF document text
    • http://devlp.design/843675380263h775.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d946e277-6ff1-496c-8a57-925fdadefc5d/niwole.pdfIn PDF document text
    • http://renureva.epizy.com/1809414765.pdfIn PDF document text
    • https://f78a7b13-e75c-4ddc-9f3c-03cd83736f6c.filesusr.com/ugd/90c53f_c0d7ea6c766e4c36b7d94e8752300382.pdf?index=trueIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_d8775ba9fac543d0a745250a2c719bbd.pdf?index=trueIn PDF document text
    • http://japefafe.epizy.com/matrix_in_rdlc_report.pdfIn PDF document text
    • http://narajogevimoxe.epizy.com/zobesa.pdfIn PDF document text
    • https://383fd46b-cc41-47b7-9379-19c19d7bb1fe.filesusr.com/ugd/81c43a_c05c94dfde054dfd8b60979a3f48532a.pdf?index=trueIn PDF document text
    • http://xefivaz.epizy.com/kojogobatexewewunaripo.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_48c73bf7fa1f476a87ff159e22e3ad51.pdf?index=trueIn PDF document text
    • http://gapojegutebu.rf.gd/add_logo_to_salesforce_lightning_email_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fae0790-18bc-4ed5-af85-9800b6ebf3d8/advanced_calculus_vs_real_analysis.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_58bd015c637b41f486cbac2609cba00c.pdf?index=trueIn 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_off0000f704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF704 4988 bytes
SHA-256: 4a54cd56a85526f7b9ef3d671ef9ddc77d02d939d3374a25cb6dfb725bdae2b8
font_01_sfnt_off00010806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10806 11544 bytes
SHA-256: 5b84c321c14fbc767bf72853273eaf3545e5cb4502a71ea0147d2b2fb6615944

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