Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c535a9b571027e…

MALICIOUS

PDF

64.0 KB Created: 2021-04-05 10:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a102ccecb01e3d390e53c5f221b12218 SHA-1: ffa5552f3b4046f00c5c000c94c0ad127044b750 SHA-256: e3c535a9b571027ed419b9c36d110da1f540dadddc8277efb5061fb0c10bcbef
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated SEO-style links, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9729

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://kuzutuzo.ru/award?keyword=demographic+segmentation+definition+pdf
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/0e865097f.pdf
    • https://warupotoji.weebly.com/uploads/1/3/4/0/134000388/derojer.pdf
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/farizis-tilofa-jubola.pdf
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/vabazilamu_kepabozomitawox_jigozuwutobu_zedumanuxuwogun.pdf
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/dewezagufaxajeguweje.pdf
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/foxabagav.pdf
    • https://sasasukaga.weebly.com/uploads/1/3/4/6/134624721/romimisozono.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_dd50bd0d2a614feeb8b7a696511d26bb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4f8ae1e4-ca9e-4a89-acba-aae2245e4db1/togarashi_mayo_recipe.pdf
    • https://s3.amazonaws.com/rizezobabub/63734091431.pdf
    • https://s3.amazonaws.com/badodemebo/68154404704.pdf
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_d6878ad0e03a4fd5975ad6e9ca13fa83.pdf?index=true
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_3cdc7fdd8be941cf98f9bea8de40287a.pdf?index=true
    • https://s3.amazonaws.com/xunilukegez/bazizomowewigiroliva.pdf
    • https://uploads.strikinglycdn.com/files/da585ff3-ba19-45f8-adff-53c872b752cc/tikurejumasigiki.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d9.bin
08ef21272c232c76628df1c2512adb985455a86c09d8443a44a04e44dacdc169		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 5536 bytes

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