Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6018e0572915552…

MALICIOUS

PDF

67.6 KB Created: 2021-01-11 23:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 619b02315e59f7f3b4ea327b6ca45dcd SHA-1: 9b5b5b28e9585753685370cb89f86a3ffe4af2a5 SHA-256: e6018e0572915552d7ea71d8e22cc7faac4b253cb8a1cd8a3f5adacbc345e7e6
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One prominent URL, 'https://trafficel.ru/aws?utm_term=counter+strike+online+free', is associated with a phishing lure related to game downloads. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing or malware distribution document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8550

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=counter+strike+online+free
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f872616bc2ae.pdf
    • https://wowaximemufa.weebly.com/uploads/1/3/1/4/131453960/c1bdf3becabc.pdf
    • https://static.s123-cdn-static.com/uploads/4500425/normal_5fcd377575e4c.pdf
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/575d6950ce6.pdf
    • https://depasosuva.weebly.com/uploads/1/3/4/4/134483816/f850072f.pdf
    • https://litazotivov.weebly.com/uploads/1/3/0/7/130740097/b3187.pdf
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/9d7020d5c.pdf
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/a20b63be.pdf
    • https://ponitunol.weebly.com/uploads/1/3/4/7/134747778/jixiwifar-verifelixuj.pdf
    • https://vozutububedem.weebly.com/uploads/1/3/4/3/134372478/9c9519bc9cc.pdf
    • https://werogevudabewox.weebly.com/uploads/1/3/4/8/134876313/raxina.pdf
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/jopititamazisag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/purawuma/13660800348.pdf
    • https://s3.amazonaws.com/tigovatolis/facetime_app_free_for_android.pdf
    • https://s3.amazonaws.com/zaxawetawupo/sokugakalufosefiluli.pdf
    • https://s3.amazonaws.com/tevomenil/guvopa.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db5b.bin
160819bc25599a504e5b295dbdfcffe5bbfd189c180ce77c2f810bab6312c0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5B 4520 bytes
font_01_sfnt_off0000eac8.bin
e0506750308394fa9d1be907eb9f139bf19413c8a90e915a13634693fc0266bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC8 11492 bytes

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