Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0553b2bd510ad4…

MALICIOUS

PDF

75.8 KB Created: 2021-05-18 08:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8fcb5c3556962fa5c18fa0786a10f242 SHA-1: 949bbce9cbc2afb7565dfee6dae97bb60b486ab4 SHA-256: 9f0553b2bd510ad4c2f9e16070476c1c39d00ab3293ba000554536963cc6466a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The document body, though partially corrupted, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://mezovuduw.ru/strik?utm_term=guion+de+un+programa+de+radio+sobre+la+cultura+maya PDF link annotation
    • https://sujujawajiz.weebly.com/uploads/1/3/5/9/135964945/8099655.pdfIn PDF document text
    • https://runidodejifam.weebly.com/uploads/1/3/4/0/134040950/1036324.pdfIn PDF document text
    • https://dakesepev.weebly.com/uploads/1/3/4/3/134308776/widub-diferon-duvafoge.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/8858634.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/6325385.pdfIn PDF document text
    • https://fizubuvi.weebly.com/uploads/1/3/5/3/135301632/tepot.pdfIn PDF document text
    • https://galinigogazefu.weebly.com/uploads/1/3/2/6/132695851/068c1cec7d07.pdfIn PDF document text
    • https://bejixetixozivi.weebly.com/uploads/1/3/4/4/134499198/680370.pdfIn PDF document text
    • https://wovegusokab.weebly.com/uploads/1/3/4/8/134850220/parez-bovatonus.pdfIn PDF document text
    • https://wazumiwu.weebly.com/uploads/1/3/6/0/136038811/lurid_xejok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2acd5585-4a81-4d21-acfb-287a5db62991/lenapoxiduzemivaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51606d24-ac50-46b9-afe2-016ceda9976b/54166292565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/100123c8-f9e4-4d89-9662-8138e4ec3bba/suwadadafedijeromada.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/slideshow_templates_for_final_cut_pro_x.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/these_happy_golden_years_audiobook_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/fevarobaparukibiz.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/swedish_language_test.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/guided_imagery_script_for_test_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/40823826308.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/ansi_c_compiler.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/el_paso_tx_apartment_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c63f42-c62d-43eb-9cab-1749929eec53/harry_potter_und_der_stein_der_weisen_pc_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/dutikuwajesuxafuvubop.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_off0000e6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 5664 bytes
SHA-256: 65116ac0c9f5f699f4de630782b27e8b1bb72e845a6df8b95cc5cc95aedaf42c
font_01_sfnt_off0000f9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 11616 bytes
SHA-256: 4e66f9ee7857a39e719141dc18e341d29838f318df34a51ee665d4d6c620c892

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