Malicious PDF — malware analysis report

Static analysis result for SHA-256 9235d22e32350b97…

MALICIOUS

PDF

79.8 KB Created: 2021-03-03 22:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2c92357b666ac87d4847b034a2e1d743 SHA-1: dcaee327ac007392684ad0c8d91945e63b4aab3f SHA-256: 9235d22e32350b9796ecdfa7ea37ae69f5372c184ba47cf47a97dd36ca07e1be
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/123?utm_term=vox+vt20%252B+valvetronix+amplifier PDF link annotation
    • http://sodahq.pro/yo_yo_fitness_test_measuresxew46.pdfIn PDF document text
    • http://itasda.online/among_us_impostor_tips_espanolyyr68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381105/normal_600076ee0c921.pdfIn PDF document text
    • http://armlur.space/el_gen_egoista_resumenixg18.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/5pJiep8/mancala_online_two_player.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/gf8hhaQ/33404953811.pdfIn PDF document text
    • http://italywow.space/71165869626s5qb1.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/Mjfhcoj/81782102950.pdfIn PDF document text
    • http://shopmzm.site/compress_size_file_onlinek82ei.pdfIn PDF document text
    • http://save50it.info/lunogapemoe5o0c.pdfIn PDF document text
    • http://reduslimitaly-official.site/laboratory_manual_for_general_organic_and_biological_chemistry_2nd_editionct8bk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5ff80118698f9.pdfIn PDF document text
    • http://myyshooop224.site/itel_mobile_dialer_express_apkklw1p.pdfIn PDF document text
    • http://nat-fru.space/lakonovudalemotufofonanad78y9j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402519/normal_5ff1755e5bb18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_5fdc4bf6854d2.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/wuroketo.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://vejegaba.atwebpages.com/35357247406.pdfIn PDF document text
    • http://pamiduzaluwo.epizy.com/ketirexiluxebufodot.pdfIn PDF document text
    • http://dudasuz.epizy.com/57226634624.pdfIn PDF document text
    • http://gebejofokim.rf.gd/kajib.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 5024 bytes
SHA-256: fc52915a35b04ace4d60d981eb9f29b8d2b33a026c0ec942f73cf403b491a95a
font_01_sfnt_off0000ff17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 10816 bytes
SHA-256: 9cce3761566fab00c482721a7d98574ff678afad755d9b98e1cee1c390167d4b
font_02_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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