Malicious PDF — malware analysis report

Static analysis result for SHA-256 292a126ef90a5f24…

MALICIOUS

PDF

73.8 KB Created: 2020-12-01 09:16:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 41de116c0d20f895ce5e528ed7c455f2 SHA-1: dfc06bc090084ab03ce3554b2a9f7d16efe6467b SHA-256: 292a126ef90a5f24b16ec66c2f9c0cd62e5a80bdf340eecaef122ca58c058221
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=brave+browser++uptodown PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488133/normal_5fbc1c644e576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470380/normal_5fba516b031e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402948/normal_5faa819f7d56b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_5fafe5387d875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5fb4366dabbb1.pdfIn PDF document text
    • https://walotowujiko.weebly.com/uploads/1/3/4/5/134582573/vafiruku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_5fa9a4bfdcd28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5f9be61f43bba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_5f9bb0f8765d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f90e852617cf.pdfIn PDF document text
    • https://bolewotimeri.weebly.com/uploads/1/3/4/6/134689798/widemimukibu_felisevajutama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f8940116feef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485926/normal_5fc4081c6e11c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_5fc0d4a984354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f8865df52ceb.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/7903169.pdfIn PDF document text
    • https://bajusokizuz.weebly.com/uploads/1/3/4/4/134400974/puxabibefefofus.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40D 5264 bytes
SHA-256: 65e147350c2cc1cf2b0342d16489f502807fcf553de2b01e99314d0be37df51e
font_01_sfnt_off0000d604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD604 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off0000dfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA5 11060 bytes
SHA-256: 17bb3113b07b21260e949b107a2100ba136ef9c74d808b5fcacdf951a5e5947c
font_03_sfnt_off00010548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10548 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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