Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d073cdac5349759…

MALICIOUS

PDF

69.3 KB Created: 2021-02-12 13:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5be33a8a549c83ddcd660fc8b56a727a SHA-1: 4133ac855006b58c3fe228c559914e03eecb3c45 SHA-256: 3d073cdac53497592463b10ca6f334398bba8e953bbf85cf0a19559c8e7b1a82
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=ordinal+position+worksheets+first+grade
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/7528683.pdf
    • https://cdn-cms.f-static.net/uploads/4471240/normal_601ac0f38a9fd.pdf
    • https://cdn-cms.f-static.net/uploads/4409798/normal_6015567c2951f.pdf
    • https://static.s123-cdn-static.com/uploads/4462038/normal_5ff6370537b65.pdf
    • https://dusivasawomila.weebly.com/uploads/1/3/4/6/134660852/1f9be44db4.pdf
    • https://static.s123-cdn-static.com/uploads/4459464/normal_5fe3a258a799e.pdf
    • https://cdn-cms.f-static.net/uploads/4393180/normal_6011d31d74caf.pdf
    • https://static.s123-cdn-static.com/uploads/4375515/normal_5fd064f9728eb.pdf
    • https://cdn.sqhk.co/mifodirula/ihQot30/rugolijelid.pdf
    • https://cdn-cms.f-static.net/uploads/4490724/normal_60203b5b5c71e.pdf
    • https://cdn-cms.f-static.net/uploads/4483089/normal_601a1e170a2ed.pdf
    • https://cdn.sqhk.co/nubenirosife/c7vPhgf/tuxotuzogasadeke.pdf
    • https://fiwadevu.weebly.com/uploads/1/3/4/5/134592392/7e5bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gasodamuza/51661827981.pdf
    • https://s3.amazonaws.com/vonutavekip/jimotaretigujunabagu.pdf
    • https://s3.amazonaws.com/sugosubexez/13478677078.pdf
    • https://s3.amazonaws.com/fadadedezeker/35603800187.pdf
    • https://s3.amazonaws.com/besafefaf/gelegodowaxevowisoratel.pdf
    • https://s3.amazonaws.com/juzinaramip/octonauts_theme_sheet_music.pdf
    • https://s3.amazonaws.com/fajonubinomeder/worksheet_about_family_for_preschool.pdf
    • https://s3.amazonaws.com/megodipewukitoj/11481810682.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d29d.bin
a17796af367b19aff991616589d5b43b8c6fcca6091e0cf6dbeca88c6b09b084		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD29D 5484 bytes
font_01_sfnt_off0000e551.bin
0ce7fc04e221db4f392b51c74b8f645e33d54887d6f37691ad2c7ff5354855c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE551 10156 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.