Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec1ca5ab73a1fa2…

MALICIOUS

PDF

67.6 KB Created: 2021-01-12 12:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1df6dfbb3a3dbf5f4a58e443796e8c7b SHA-1: 19814f60a34c63e7fde89169675c644f25319976 SHA-256: 3ec1ca5ab73a1fa24496c0d967f612a976041b29084d5450d10b1f5c1d2390ab
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 pointing to S3 buckets and other domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URL 'https://trafficel.ru/aws?utm_term=search+multiple+excel+sheets+at+once' is likely part of the lure to direct users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9541

Heuristics 4

  • 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
  • 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=search+multiple+excel+sheets+at+once PDF link annotation
    • https://site-1180442.mozfiles.com/files/1180442/tangled_2021_release_date.pdfIn PDF document text
    • https://kaxapanokatonab.weebly.com/uploads/1/3/1/0/131070327/vitutimowig_gulaxowoxojew.pdfIn PDF document text
    • https://site-1237926.mozfiles.com/files/1237926/14368087255.pdfIn PDF document text
    • https://site-1168050.mozfiles.com/files/1168050/98790785227.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/android_tv_aux_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/fulebixovurilip.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/16978136649.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/10477806646.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/internet_manager_patch_for_all_version.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/caecilia_lt_std_light_free.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/jovadimofowasajozo.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/badezujewusofofobipe.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD68 5344 bytes
SHA-256: 360f2777bf4fa77896c9a94bc71560a33870f30aaaf44439cdd0f845cec8d98d

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