Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12cb6fcaeab2673…

MALICIOUS

PDF

58.8 KB Created: 2020-12-01 16:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 81919c0df9875d250b33c91c21f8bb36 SHA-1: 7ea019e37057f7e26db98e8c44a177817a8bbfa5 SHA-256: c12cb6fcaeab2673233a92ec81f65c25621748d72ca208d0ed8e554ce2619ca1
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a phishing or scam attempt designed to lead users to malicious sites. The ML classifier and ClamAV detection further support the malicious nature of this file, likely exploiting PDF vulnerabilities to execute code or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=mind+power+book+pdf+in+hindi In PDF document text
    • https://levoveto.weebly.com/uploads/1/3/4/8/134897684/lunixo-tatelafij-zigemosasovag-monipujakubiju.pdfIn PDF document text
    • https://kofusozefo.weebly.com/uploads/1/3/4/5/134515267/e94d0f.pdfIn PDF document text
    • https://megogira.weebly.com/uploads/1/3/4/5/134590171/6779039.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/zirojopemup/sharper_image_super_wave_oven_recipe_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/vokijobowogirezibesisewu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/autotable_jspdf_html.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/deparazabegekimonedofo.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/51341758002.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/adobe_photoshop_lightroom_cc_apk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/frozen_fever_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/52145031410.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_off0000acfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACFE 5012 bytes
SHA-256: 12435430075af2e2a61ff00433e9aa2d387860dc2828976f802aafa63ca5a55b
font_01_sfnt_off0000be1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1E 9488 bytes
SHA-256: 9f2bbba75a0250896d9ee16bf9cafd24faef2059f08cc952a042a0e90712aa6b

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