Malicious PDF — malware analysis report

Static analysis result for SHA-256 c685b37ed043cb78…

MALICIOUS

PDF

100.2 KB Created: 2020-11-21 06:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5806724ff98bc865e8e7e1c25baed95f SHA-1: 9e768cbb55391aa18a5a3a06d901319274aea1e3 SHA-256: c685b37ed043cb780ed4f5996c2ff5afad681715268bcbd342d37e0a26bbe11f
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farm or phishing attacks. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, with one prominent example being https://jimakujomeda.weebly.com/uploads/1/3/4/4/134438408/2567488.pdf. The embedded URL https://trafffe.ru/aws?utm_term=can+i+anonymously+report+child+neglect, combined with the document body's text, suggests a lure to a malicious site. ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9547

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://trafffe.ru/aws?utm_term=can+i+anonymously+report+child+neglect PDF link annotation
    • https://jimakujomeda.weebly.com/uploads/1/3/4/4/134438408/2567488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482424/normal_5fb69b456e555.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/mutezubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f946affefd86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426408/normal_5f9898df20439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_5fa1298b88f14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458621/normal_5fa90c5d21f9e.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.pdfIn PDF document text
    • https://madaleva.weebly.com/uploads/1/3/4/7/134772198/09e67266e4ad8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5f927e3206462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449618/normal_5faece80e3ec8.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/kavitokolezub/zegamo.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/historical_approach_to_the_study_of_political_science.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_off00016e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E24 5496 bytes
SHA-256: a8a9b50ef58b917b59a5b3029b00dc331baa58b5693720479f0532549ec586cd

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