Malicious PDF — malware analysis report

Static analysis result for SHA-256 468b20c4d30fde17…

MALICIOUS

PDF

67.0 KB Created: 2020-12-23 02:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 401927dc939ae77e4749bbe41e557269 SHA-1: e97a1fcc0d21cb5f86eb086710d8c003541d1960 SHA-256: 468b20c4d30fde1771a0b58b9b60d66f69c6dae9deeae1814ed68994f4415e2d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, suggests a lure related to WhatsApp stickers. The presence of numerous external PDF links further supports the classification as a link farm, likely used to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=cara+pakai+personal+sticker+for+whatsapp In PDF document text
    • https://static.s123-cdn-static.com/uploads/4461523/normal_5fdd60d053d28.pdfIn PDF document text
    • https://dapunilak.weebly.com/uploads/1/3/4/5/134506399/vipodudesof_rutamivuw.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/zakamasuxepas-munitokupa-xumuxawi-mezidaf.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/tomexutugeligukox.pdfIn PDF document text
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/wukurivanipag_makikijelana_julavuposaf_viwuzezuj.pdfIn PDF document text
    • https://fisegumatiwal.weebly.com/uploads/1/3/4/7/134722042/pagobo.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/nupotukig/94069737778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2387a54-3c3a-48c4-a3f5-79993cacbc3c/razovuboza.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/37932086984.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/car_maintenance_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/pine_grove_middle_school_valdosta_ga.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/75574962094.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/atonement_imdb_parents_guide.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_off0000c72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72D 5164 bytes
SHA-256: a9118099d11bb51c666d8f90c65608b54aa4fa473744969ea919bff9356c9ea1
font_01_sfnt_off0000d8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CF 11776 bytes
SHA-256: fc9fbccf9d6c41b2b74e8173fa23ed235d4736f88b0abbd08845a9ecb511f1f8

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