Malicious PDF — malware analysis report

Static analysis result for SHA-256 76da58ea46293edf…

MALICIOUS

PDF

66.6 KB Created: 2021-04-01 18:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e90df4c1a8d63aeacead7b5ff0e97ced SHA-1: 918e02b2f2c613c0128c20b9f9daa61e27394660 SHA-256: 76da58ea46293edf0c5ba6f8e7f7740786fb372782f30b1107ea704b3e3ef811
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 0.9892

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://crophysi.ru/aws?utm_term=best+blues+guitarists+list PDF link annotation
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/jobidigekizaged-xulizen.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/kakag_vezuselanegek.pdfIn PDF document text
    • https://doxugibako.weebly.com/uploads/1/3/0/7/130776338/9291834.pdfIn PDF document text
    • http://carbags.site/pixuvizininifx0yf8.pdfIn PDF document text
    • http://instofficial.online/is_bowflex_good_for_bodybuildingssi40.pdfIn PDF document text
    • https://kezugefoluvero.weebly.com/uploads/1/3/1/8/131856244/poginojumisiguledux.pdfIn PDF document text
    • http://ramisur.22web.org/25742846991.pdfIn PDF document text
    • https://gufogejerujog.weebly.com/uploads/1/3/1/4/131406717/2080669.pdfIn PDF document text
    • http://sosed.market/43916887358j0k7m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_6019704ef235a.pdfIn PDF document text
    • https://xizuzumuk.weebly.com/uploads/1/3/2/6/132682261/2864523.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470979/normal_6004d6f77fb24.pdfIn PDF document text
    • http://legko.travel/how_much_money_do_you_need_to_start_a_hedge_funda4kky.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/sitijatatezexofak.pdfIn PDF document text
    • https://kotedeturu.weebly.com/uploads/1/3/1/6/131606402/nujarexuxiwimanise.pdfIn PDF document text
    • http://boxidodo.22web.org/abba_waterloo_lyrics.pdfIn PDF document text
    • https://nudevikitexes.weebly.com/uploads/1/3/4/5/134506517/9673429.pdfIn PDF document text
    • https://tudegikugil.weebly.com/uploads/1/3/5/3/135317618/7115049.pdfIn PDF document text
    • http://meetchat.space/xisoginiloxotozubotol6n73d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_d4080d2b29094775bad7424f387b4919.pdf?index=trueIn PDF document text
    • https://b89c0965-50b5-483f-b67e-52f573158f4f.filesusr.com/ugd/1e222e_eb6eaf20be18431896e17aacd7cc5fdf.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_d459cc1616c94df2a5a3c38043b8d967.pdf?index=trueIn 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_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 5044 bytes
SHA-256: 00c163d275f45012193311e0fd136ac846da04888880db59a0bdc6dea532aa44

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