Malicious PDF — malware analysis report

Static analysis result for SHA-256 9738e2bb30251e1d…

MALICIOUS

PDF

68.7 KB Created: 2020-12-17 01:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3f1aee4c230b7f40d0e38c225964197f SHA-1: d7ee20fee44c3e0e284f9bfce14a66d5884a4cfb SHA-256: 9738e2bb30251e1d6c4dcdec1485f56cde19e0af87c179e0b8039efcbe380cbe
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Weebly-hosted PDFs, indicating a link farm strategy designed to attract traffic. One of the primary links directs to a known malicious redirector, suggesting the document's purpose is to lead users to malicious infrastructure. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

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://traffmen.ru/aws?utm_term=free+wordpress+ecommerce+website+templates In PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/dajugibizaj.pdfIn PDF document text
    • https://nulakumoxuguv.weebly.com/uploads/1/3/1/8/131871970/nupawemew_faxunipolenemo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5f95b1b9d811c.pdfIn PDF document text
    • https://zobezuked.weebly.com/uploads/1/3/4/5/134502366/vumijakasatudof_risux_fezabawidoforim.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/busezananixilo.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/5292967.pdfIn PDF document text
    • https://kerawidirara.weebly.com/uploads/1/3/4/7/134746453/jagodidonepikaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/28029088653.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f24c403f5353fd95fd42/t/5fc67a563f75b16643b443dd/1606842966883/defense_legend_3_future_war.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/online_education_system_project_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051b0e33-6ea9-45b0-b443-8a0842ddc4e0/cheat_codes_for_need_for_speed_carbon_ps3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92e8c878-5332-4b1e-8528-e7affdecdafb/duwevipotivek.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/68091548590.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/agilent_gcms_chemstation_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/hatha_yoga_poses_for_beginners.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6617717e72026400f6ae7/t/5fc868fa46ef2e08cbb5482c/1606969595955/25904520222.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_off0000ce6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6A 5408 bytes
SHA-256: 9755ec04c1dee6d73a7c8a97b038cc278b97d0fead924b8847c5f1e3c02ccab4
font_01_sfnt_off0000e0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C6 10728 bytes
SHA-256: b537fd2fb7bbe10e8330ac9cd55a6f7a34a87f8f8232c1410ff51b2f518ea84d

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