Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e408d920430da46…

MALICIOUS

PDF

68.0 KB Created: 2021-06-15 10:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e1f4059edc3b52da9069814f119f94ed SHA-1: d3b22313bf6e57ef61e54d0eac42a6693604eb66 SHA-256: 1e408d920430da464a8b08a7d21927cfc7286fdbbd89c9ff4a98aad75c620bed
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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://crewmak.ru/pbw?utm_term=dragon+ball+super+broly+english+cast PDF link annotation
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/3550335.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409627/normal_60090c1a068f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_5fdc10c92df9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_60c6bf524946b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375361/normal_5ffce022b6b23.pdfIn PDF document text
    • https://fenitejum.weebly.com/uploads/1/3/2/3/132302819/5649279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_60188753a0d1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468551/normal_5ff87028f3e12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_604d26d9020be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450356/normal_602fdbf20c8f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420608/normal_60463401ee722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478669/normal_603568eda8e8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rivapisi.pbworks.com/f/new_gana_song_in_tamil.pdfIn PDF document text
    • http://fiwonotexo.pbworks.com/w/file/fetch/144705192/alai_payum_nenjile_album_song_download_masstamilan.pdfIn PDF document text
    • http://momabigada.pbworks.com/f/miraculous_ladybug_season_3_in_order.pdfIn PDF document text
    • http://gazoridixilu.pbworks.com/f/metarumotufuvapesopu.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/w/file/fetch/144509835/76548229992.pdfIn PDF document text
    • http://woziralipu.pbworks.com/f/xidirisovizujitewudij.pdfIn PDF document text
    • http://xizisimavi.pbworks.com/f/how_to_find_area_of_two_similar_triangles.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_off0000e424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE424 5436 bytes
SHA-256: ab42b7a4f486d9f6116d31801e490aecc4e8eedd16039021451ba73e8f51f158
font_01_sfnt_off0000f69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 2140 bytes
SHA-256: fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2

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