Malicious PDF — malware analysis report

Static analysis result for SHA-256 befde844dabf990e…

MALICIOUS

PDF

71.1 KB Created: 2021-03-07 22:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e2974e562215a2a3e05a88dab2a727bd SHA-1: 7fc1a0197abeacefd4b5c801f0a9f1dfa5d4952f SHA-256: befde844dabf990e49e1444d0a1e2fb66ed7f3aa2df7bbcf85a9cfb5dd24cb3b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the nature of the heuristics strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8494

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://mezovuduw.ru/strik?utm_term=how+to+open+bonaire+evaporative+cooler PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fe4c65687357.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/bgfVqij/32284531481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448126/normal_60386c363f6a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407749/normal_5fee426fa5c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_603ba44218441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_603e4908af105.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/5Jkgdhf/fofinuletuwalemawesejiker.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/ctjegeM/dazavisupewum.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/jOkijh5/xugelugave.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/eDIhidE/53915801545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459328/normal_600fd758b986f.pdfIn PDF document text
    • https://buzikapafopix.weebly.com/uploads/1/3/4/3/134375334/lugebiwutugulunujis.pdfIn PDF document text
    • https://migawireradafus.weebly.com/uploads/1/3/2/6/132695569/4291185.pdfIn PDF document text
    • https://namewedopuso.weebly.com/uploads/1/3/4/5/134583017/6717206.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416940/normal_6001cc8e19d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501057/normal_600da3b69483d.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/S9hhqxZ/vodunirikosegipotute.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/gipesinobufete_wusuvurus_sijetorowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fe1caae65760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_5fd77711cfb78.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/gh1giib/music_player_app_download_for_pc_7.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/xifabilejilab/37356210666.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/1302905198.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/70372912653.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/ativador_office_2010_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/juwoxa.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 5004 bytes
SHA-256: d04b18908040e859b37b00c8420392993e5cd2fb9d6834b4d40babb6f6bc385d
font_01_sfnt_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 10300 bytes
SHA-256: cf169082eecf65caaaee4e66b1564949bb69777e44bfc5923c35fdc76ff1de0d

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