Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f812c2ca512ecc…

MALICIOUS

PDF

67.6 KB Created: 2021-01-26 11:49:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7e94faa925bce219de9f44be5f4f749c SHA-1: b6d326d9a002ee7dd325a263e9fe7c27e15a77f8 SHA-256: 83f812c2ca512ecc465b907590daa1ab06e28394cccfa373ab970c4620f270c8
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 domains, suggesting a link farm designed to host malicious content or phishing pages. The 'Goalkeepers report 2017' text appears to be a lure to entice users to click on these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/aws?utm_term=goalkeepers+report+2017 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5fd9b6912992d.pdfIn PDF document text
    • https://duvokazi.weebly.com/uploads/1/3/4/1/134108747/dibinogaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388825/normal_5fee681663b32.pdfIn PDF document text
    • https://cdn.sqhk.co/naxiwakiwuv/ChcHEBN/23725972228.pdfIn PDF document text
    • https://nufawufaza.weebly.com/uploads/1/3/0/7/130740177/972bbdd5d8.pdfIn PDF document text
    • https://pupazugosabi.weebly.com/uploads/1/3/4/8/134868946/roxarobotijavesoboxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5fe82e4aa209a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426262/normal_5ff170bf52792.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/adf0c030f.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/gckjaie/punch_boxing_warrior_ninja_kung_fu_fighting_game.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/ggUiejh/vexed_cast_season_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368759/normal_60097cb71447b.pdfIn PDF document text
    • https://cdn.sqhk.co/xivumatozo/fhahfia/cross_cartoon_drawing.pdfIn PDF document text
    • https://tesazosutev.weebly.com/uploads/1/3/4/7/134714215/samipu_pimemofezufo.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/hciccij/one_punch_man_season_2_release_date_crunchyroll.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/jenagubadopi/xuzupimuta.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/couple_of_days_nigerian_full_movie.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_off0000e520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE520 5316 bytes
SHA-256: 18c00d1613ebfe68ca9b5a58d53ffc27ab3d8c68e3eefdaf8a6b371c2998eb38

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