Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab012a8fdab207f7…

MALICIOUS

PDF

70.6 KB Created: 2021-02-17 16:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 61dfb03b5cd0d9a2797d69cd9fcfa810 SHA-1: f6533d9a48a33755853f92efa6a89eedc61e576c SHA-256: ab012a8fdab207f76dd7deca8306dd51bd25a7b62244b198f46ff485a9bedd8b
154 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 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 4

  • 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.
  • 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://yafferge.ru/strik?utm_term=air+force+ranks+and+insignia+of+pakistan In PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_602b0f1e2266c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_6022591567eac.pdfIn PDF document text
    • http://biweekamnf.com/african_animal_symbols_and_meanings661ws.pdfIn PDF document text
    • http://detonic-romania.website/55729780501ld03z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_601f56c7ac44a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459027/normal_6007bcee50b37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454287/normal_600835d7c5417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490917/normal_5fde93e370b01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_6008c2e65c5b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465949/normal_5fe4263094602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5fef5398d75eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476416/normal_6019af1bdbc53.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/penale/72733610622.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/graphing_inequalities_on_a_number_line.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/mako_unicompartmental_knee_arthroplasty_technique_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/bernardinho_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/diferencias_entre_ciencias_formales_naturales_y_sociales.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_off0000d668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD668 5344 bytes
SHA-256: ee0164ad884938859d5f5c27ee039de2da754045cd928754fd3ffd3a413cf4c8
font_01_sfnt_off0000e8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AD 10596 bytes
SHA-256: a2078d20d962a8621bcb87a70807920a21a585a4832466c3e51b5cbf5c4cc31a

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