Malicious PDF — malware analysis report

Static analysis result for SHA-256 e149fcecacf844e9…

MALICIOUS

PDF

67.6 KB Created: 2020-12-25 01:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 08cf2524ef41542a5f71fcc99dfd05c1 SHA-1: 4bd5a0eb6ac22e2a8f9e6f4a62b889d8d4d22956 SHA-256: e149fcecacf844e932e8369edd5f7c492a0989307dc5687f12c98dfcc5ffb994
184 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8462

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=metformin+extended+release+tablets+usp+monograph PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393016/normal_5fb69975d8b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f8e511a22889.pdfIn PDF document text
    • https://dinelelulom.weebly.com/uploads/1/3/4/3/134308509/penizovepug.pdfIn PDF document text
    • https://xemibunadagom.weebly.com/uploads/1/3/4/6/134639404/jarenirojujifaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411512/normal_5fceab4c9b5d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387230/normal_5fb35f6f90cea.pdfIn PDF document text
    • https://tokikagusiwa.weebly.com/uploads/1/3/4/0/134096322/dakawomo_wisefosiziwiw.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/gazip-zenezirajiparo-sikilavutofoki-lefonulotiguse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f98d16e48460.pdfIn PDF document text
    • https://kapekutom.weebly.com/uploads/1/3/4/4/134437999/wefatonaxaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493873/normal_5fdb5c0b0a4fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fa6ddd4012e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_5fb5a4318bce9.pdfIn PDF document text
    • https://bunogijadijis.weebly.com/uploads/1/3/4/8/134896562/972211564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5fad5b49ccd07.pdfIn PDF document text
    • https://lamosovi.weebly.com/uploads/1/3/4/6/134600354/tutumavagegitilov.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/dot_net_framework_3._5_sp1_msi.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/xuboxexojuwejukaxopuxig.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_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 5668 bytes
SHA-256: 4dd5d0e0101f88ce46c152faf3d9c185ec502b7809557578687862b00ca2fe8a

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