Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0f64f85c502d75…

MALICIOUS

PDF

74.4 KB Created: 2020-12-07 16:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 896984a63b4ec489c07e20c42aa1e1a1 SHA-1: 93130c7862e9e7f0e5f23cf320a119dd7098c362 SHA-256: 0e0f64f85c502d759b621fcd7ac692cdcffa5faad3a557145a92f17cd2829069
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=reference+letter+template+for+high+school+student In PDF document text
    • https://voziguwotameba.weebly.com/uploads/1/3/4/3/134345279/237228.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/sotifuruwozep_vuvukurowetid_gaxiranilejaz.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/c1d1d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450421/normal_5fbf370d24aef.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/4236281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe04b79b1ed03538a16a3b/1606288567456/gonasosuluramodexi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4bfbf403f5353fdae5828/t/5fc88989b74dd54858dbaceb/1606977929471/let_sleeping_worms_lie_origin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdb415687f52b6b7b2913/t/5fc0d753cb3e0f57716f3747/1606473555755/closing_of_the_muslim_mind.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc554c4a13a450bab11d5d1/t/5fcd6e749aa2de0c64a7e460/1607298676893/animated_stickers_for_whats_wall_art.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc296788787e8798976c150/t/5fc44c0918e72e5fdb60ff20/1606700044648/independencia_de_mexico.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7bb2e04a8c57c148c4860/t/5fcd96780ab5d62feb0cf99b/1607308921813/34975262206.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 5576 bytes
SHA-256: 48960912f8556590b45cc92bc2d816463847bc41736695f735d81ece2d115cd9
font_01_sfnt_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 10912 bytes
SHA-256: 2b68bd98082e4502bc0eb6c6c7a959bf2a10b60f3f506f6f013860048f7b5197

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