Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e70ae02f6a996f8…

MALICIOUS

PDF

66.2 KB Created: 2021-01-23 15:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: af7ce4c8c2676806f666f2e374363b04 SHA-1: 3d6f7d3f7c37aa872da2a23abdfad9ff3cb3e576 SHA-256: 0e70ae02f6a996f82692477a34bb74aecb3409e50a0ec3145fab4f72f61b8275
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDF files hosted on services like Weebly and Mozfiles, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a URL that appears to be part of a SEO-based link farm, which is a common tactic for distributing malware or phishing content.

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://traffine.ru/aws?utm_term=angular+6+form+validation+custom PDF link annotation
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/duxufug.pdfIn PDF document text
    • https://site-1172267.mozfiles.com/files/1172267/pew_pew_pew_lasers_iphone.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/zuxisab.pdfIn PDF document text
    • https://zapotaputilaka.weebly.com/uploads/1/3/2/6/132683001/5679061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_6008ac7a29aa2.pdfIn PDF document text
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/ce851b60a9f2.pdfIn PDF document text
    • https://site-1180467.mozfiles.com/files/1180467/little_heroes_books.pdfIn PDF document text
    • https://site-1174864.mozfiles.com/files/1174864/18828709963.pdfIn PDF document text
    • https://site-1247202.mozfiles.com/files/1247202/19097326968.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/kakekojezutok/other_others_another_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/pediatric_hemolytic_anemia.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/dafivak.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/firekogiwemolonaladof.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC100 5544 bytes
SHA-256: 2648ab6585bcc729e97aab21b5d046570f16319fc86538ed29781ca73adfc337
font_01_sfnt_off0000d3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D3 11688 bytes
SHA-256: 9f6839a4c278b99aed639a4489749b337dfe20672f4f0cbe90a731945cf3fca7

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