Malicious PDF — malware analysis report

Static analysis result for SHA-256 98005bbc72ba6af9…

MALICIOUS

PDF

61.3 KB Created: 2021-03-29 04:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae3e8db46f4a6f184a6236559f1f82f9 SHA-1: 15454a28e04d78ddf7fcf97f94758c43667d3c7a SHA-256: 98005bbc72ba6af983c7f3b5952d42c474323811408eb05e7efde293fd8421c9
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and a machine learning model indicating maliciousness. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs point to various domains, likely serving as lures for users to download further content or be redirected to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9715

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/award?keyword=at+43+una+army+book+pdf
    • https://cdn.sqhk.co/nanagajog/IDLieZL/furube.pdf
    • https://zizipidefogin.weebly.com/uploads/1/3/4/8/134852386/5bf7d.pdf
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/vezejal.pdf
    • https://cdn.sqhk.co/rapovebakeb/2MhcASB/lowutojiputuwamig.pdf
    • https://cdn.sqhk.co/nopawuwam/f68ghia/kaiser_jobs_fresno_california.pdf
    • https://cdn.sqhk.co/rabataxuvax/kibYv8r/hashtags_for_tiktok_likes.pdf
    • https://cdn.sqhk.co/tiwopaperuv/LhgRjso/jebatinupo.pdf
    • https://cdn.sqhk.co/bipuzojafa/cbgjjjP/riguwovesufamuvi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gizonukorad/berodutubijowixijigaso.pdf
    • https://s3.amazonaws.com/wozowuledij/49982152951.pdf
    • https://s3.amazonaws.com/xalexojaxipud/bedding_sheets_online.pdf
    • https://uploads.strikinglycdn.com/files/c516b108-1b25-4e5c-86a0-2b2c1d393c28/speaking_up_without_freaking_out_free_download.pdf
    • https://uploads.strikinglycdn.com/files/af8d375a-bae6-48c5-9e62-c79b0724a1f1/17544863000.pdf
    • https://s3.amazonaws.com/mejobu/cognitive_biases_poster.pdf
    • https://uploads.strikinglycdn.com/files/19bd64f8-dbcb-4723-882e-b2b924c2349c/43500064634.pdf
    • https://uploads.strikinglycdn.com/files/cc78fe66-202b-4098-a9f5-78e8405f7d1a/nimomijiwelegineliz.pdf
    • https://s3.amazonaws.com/fevobelijogal/dodidigaxefedasize.pdf
    • https://uploads.strikinglycdn.com/files/72bd02f7-cd76-49df-ba3a-cc5c5e014ec3/ffxiv_materia_concerns.pdf
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_76ce3e1bff6f4ed28b0b14dda0e5319d.pdf?index=true
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_3fd3ad085c8648129caa1b6e7fe058db.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e23f.bin
825aaab8523a2b5bc3d5467304fdffe0556a5e659d03164a5b98db4861430a57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE23F 5524 bytes

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