Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fd1b59fe798ada…

MALICIOUS

PDF

73.5 KB Created: 2020-12-08 17:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1c7c00c0a2f0827f5c01825f3504849e SHA-1: ef6efb1938643ac1bc5813a21a9e077dde1b2504 SHA-256: 02fd1b59fe798adad86f695ea2f595c46aaec4f5ac9a5b5f694f5b838a620450
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains references to "King of Kash reviews" and "wkhtmltopdf", hinting at a deceptive lure to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=king+of+kash+reviews PDF link annotation
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/185478c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5faf9bd4c1a3d.pdfIn PDF document text
    • https://defagetomorig.weebly.com/uploads/1/3/4/5/134576552/1497507.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_5fc2294510370.pdfIn PDF document text
    • https://lumuvimusu.weebly.com/uploads/1/3/4/7/134719948/cdc6ce0e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_5f8e453a9857c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_5fb3346b3a42d.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/piradi/74108091291.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc295c5a5bc066edfb0618a/t/5fcbf71105ddc9599d0b09d1/1607202577535/setezasewomalonuvapid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66998d49dd124475a272a/t/5fc8becfe101942bf777e8bc/1606991568816/rogatobosewe.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/long_multiplication_worksheets_year_6.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/a4_format_paper_size.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_off0000e27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 5180 bytes
SHA-256: 429371d37eed1398f18d4e0eac1a3bc575f3910e284b626e2d4d24ed9d16e7dc
font_01_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 10896 bytes
SHA-256: b6b777da26ef9967de0a4c31c7dc26b4c47c2681fcd1bcac8e15076458c88839

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