Malicious PDF — malware analysis report

Static analysis result for SHA-256 4973f5df6c8a3088…

MALICIOUS

PDF

37.4 KB Created: 2020-06-08 02:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6bb859e7e6ecb9106372397394e1c17 SHA-1: 4487247713bfade7e3ee478bd8870594528837ec SHA-256: 4973f5df6c8a30886bda0b20be2c4ceb697fb48b80536762ffe70724344dd4f0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links to various domains, a technique often used for SEO spam or to distribute further malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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 http://falkenberglunch.com/uploads/1/3/1/8/131856209/131856209.html#r%25C3%25A9solution+probl%25C3%25A8mes+cp
    • http://mail.pbrc.net/uploads/1/3/1/4/131437005/zivonibojuzo.pdf
    • http://caribbeanphoneunlock.com/uploads/1/3/1/8/131857695/7443232.pdf
    • http://bornwildkids.com/uploads/1/3/0/5/130539442/majanulepuko.pdf
    • http://riyasnails.net/uploads/1/3/0/8/130873927/guvujepawizil-sotav.pdf
    • http://mitchellparkequestrian.com.au/uploads/1/3/0/8/130874655/c58e41358a6.pdf
    • http://dicountkidsuniforms.com/uploads/1/3/0/7/130738548/pidodakijetoga.pdf
    • http://exceptional-body-language.com/uploads/1/3/0/7/130738822/ruzifulelajazam.pdf
    • http://addcoredesign.com/uploads/1/3/1/3/131379219/0bf8d6ebe0.pdf
    • http://webmail.highlandfairview.com/uploads/1/3/1/3/131398286/33ce2ec5d6.pdf
    • http://andreasalgava.com/uploads/1/3/1/4/131436997/eed9a2a84.pdf
    • http://experiencegarda.com/uploads/1/3/1/1/131164386/morilenakatose-vamag.pdf
    • https://murulejam.files.wordpress.com/2020/06/vixasu.pdf
    • https://livukux.files.wordpress.com/2020/06/58306561777.pdf
    • https://zubugoko.files.wordpress.com/2020/06/65696386274.pdf
    • https://sotitinixujo.files.wordpress.com/2020/06/wezanufem.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006102.bin
69e7e6f2ebf27ed557b42b3557067d94820561d0e73ced2c0e70c04e63c33f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 13124 bytes

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