Malicious PDF — malware analysis report

Static analysis result for SHA-256 35082bed75c30b62…

MALICIOUS

PDF

72.5 KB Created: 2020-11-14 18:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c08b55120aa5cf2af968be0c5a0b3f49 SHA-1: 97b481f47efec8c7117758297d166465bdf88e1b SHA-256: 35082bed75c30b622b37a7c3dac8df78e9662226a1a71763cf733732341f05f5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/strik?utm_term=apostila+curso+de+armeiro PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f9d4d008d90c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f875d56ce10b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_5fae0530136d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f9a93ec97169.pdfIn PDF document text
    • https://terogoke.weebly.com/uploads/1/3/4/5/134587715/kifat.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/2b7c5a14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f8fb62d136f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f890ef9487b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465705/normal_5fa5dcbe24a44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426679/normal_5fa6c4ce1e513.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_5f8f8fd1d7f85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5fa03f7f29fa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8a072c9a70c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA28 5208 bytes
SHA-256: 408a5aa640cb4de3a1fe63147e4009855c6a9ee4e40bff96f0ee9fad6ba109bb
font_01_sfnt_off0000cbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC8 13468 bytes
SHA-256: 836fe5b7fad121aa5ff05b24003f691a3dbd5f1bdcc830679bce157f73133124
font_02_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 19024 bytes
SHA-256: 06017ef02468ec75931ec39b4a3ec408ccf71bc9438ede3a52dfba98d9c70770

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