Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a067e4b41c1964…

MALICIOUS

PDF

74.0 KB Created: 2021-02-14 04:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87d8b1ce7f086e8b90333c6c1b0346a8 SHA-1: d11645ff75988c5931ccb59a4978c60b62012829 SHA-256: d4a067e4b41c196426d2b7cc0e10153f97626b80fe663a7763910910e988f595
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 documents, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=hunter+irrigation+controller+manual+pro+c
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/9fa3475e7864832.pdf
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/peveba.pdf
    • https://cdn.sqhk.co/riraxizilob/dRCJidl/drive_unlimited_storage_free.pdf
    • https://nirasiban.weebly.com/uploads/1/3/4/3/134344158/8554c.pdf
    • https://dufebekeromodi.weebly.com/uploads/1/3/0/7/130776386/goxugilazitajeluve.pdf
    • https://vowopazi.weebly.com/uploads/1/3/4/0/134096587/dezuwevuxe.pdf
    • https://ketadamofexawun.weebly.com/uploads/1/3/5/3/135349072/roruxereduluv-besixa-sejawav.pdf
    • https://cdn.sqhk.co/woxutonezem/jgwhfij/90249895186.pdf
    • https://kixixowagixu.weebly.com/uploads/1/3/2/7/132710794/mizipevujanupeda.pdf
    • https://pepulumowuso.weebly.com/uploads/1/3/2/6/132681954/velil_kixudedigajos_gejamed_gojib.pdf
    • http://pafiwuz.66ghz.com/50237587908.pdf
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/talabose.pdf
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/rozegozozefapun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/megujobemegor/maplestory_bishop_guide_2019.pdf
    • https://s3.amazonaws.com/bajapovogam/jukorulepunefilabafuje.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_off0000e670.bin
121de24de979061af0492f5f2ea7e5481cc98c824baa9fa420aed7618c85f274
pdf-font-stream PDF embedded font (sfnt) at offset 0xE670 5036 bytes
font_01_sfnt_off0000f77d.bin
feb85c6e4a29ea760bd8598850fe9973ad0ee32ff7d5727ea94b8c8b1eca4eb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF77D 10276 bytes