Malicious PDF — malware analysis report

Static analysis result for SHA-256 8008e53b6bb901fa…

MALICIOUS

PDF

76.3 KB Created: 2021-02-28 23:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ace7032458341e1e6074a4ce451564ee SHA-1: 552a8c70ee7c22fab6f4f66361361b452bae85bd SHA-256: 8008e53b6bb901fa4ac6e39505abe8646b189144e82ef2ebf938e3cb2062b3a3
154 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 of which are SEO-themed, suggesting a link farm or content-spamming operation. One prominent link directs to 'jacksth.ru/award?keyword=what+is+the+process+for+police+interrogation', which is likely a lure to a malicious website. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or malware distribution document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8725

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://jacksth.ru/award?keyword=what+is+the+process+for+police+interrogation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404116/normal_6023d8ffdc083.pdfIn PDF document text
    • http://winclean-shop.space/630229714391yew5.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/how_much_does_a_baldwin_baby_grand_piano_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403406/normal_5fc8dcb76dcdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_60029476ca988.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490752/normal_5fc859245c4eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_600d4f0b0e5f8.pdfIn PDF document text
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/ba2d0f3.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/29476092391.pdfIn PDF document text
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/cb645c458.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/saxon_math_course_1_practice_test.pdfIn PDF document text
    • http://ledy66.net/carnivores_2_windows_7uf8ug.pdfIn PDF document text
    • https://zefijevizo.weebly.com/uploads/1/3/2/3/132302816/bcd1d7834b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468823/normal_5ffff3d61b6c5.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/1419947.pdfIn PDF document text
    • http://lamejix.scienceontheweb.net/2000_ford_ranger_stepside_bed_dimensions.pdfIn PDF document text
    • http://fb-ig-violation.com/minecraft_pe_pixelmon_mod_downloadekqjv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391037/normal_5fef8d82102f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410415/normal_5ff77f7c97619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://warufadul.rf.gd/puwefovufopodorakes.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/how_to_describe_a_tropical_rainforest.pdfIn PDF document text
    • http://fonenafuw.rf.gd/math_puzzle_worksheets_high_school.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF160 5076 bytes
SHA-256: e91561d8c5535e81e8da9bd9e33d6640cfb0d57d49bb623d3d3431bd79b478a8
font_01_sfnt_off000102a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 10704 bytes
SHA-256: 1f35ddc9f0bef7722ae04ebb5b76b8ca503e66a41bf42d85cf39f8c94ef3532c
font_02_sfnt_off00012759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12759 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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