Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80bf4feb94520eb…

MALICIOUS

PDF

89.6 KB Created: 2021-03-22 01:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a355e44f0dd8623086d0363ab33e7f9c SHA-1: 285ea1a8cb821419727491c35c171ea564a7a186 SHA-256: e80bf4feb94520eb8e54562631a69d92461d43e4b64bd1701a6b4768c31c91a8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/award?keyword=react+js+tutorial+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464083/normal_601b3df06debf.pdfIn PDF document text
    • http://creditpm.com/437744268077r3o3.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/katalog_toto_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379483/normal_5fffa16dee175.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/motorola_mc9190_enable_barcode_scanner.pdfIn PDF document text
    • http://sallehq.xyz/pugolusozadapivorenitolr6ic.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/44646818148.pdfIn PDF document text
    • https://cdn.sqhk.co/kusedesomawa/VigHje5/glyphis_shark_australia.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/how_to_pair_two_mini_jamboxrluso.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/fhiigii/mularifofisetiwelerozafo.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/calendario_rusia_2020_chile.pdfIn PDF document text
    • http://craftsmansmetics.com/33679739441edtgt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410207/normal_5fe865c8e0dcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381740/normal_60313087ca045.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/purixifusipelid/74635350395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e689b6cc-3c16-4869-8269-927e8a782576/oracle_sql_developer_install_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/510eb746-7635-4e7d-be6d-f4aad082a0d5/singer_futura_xl_550_price.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/meniziropinutegatetavan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dd2c02-145b-4278-a3c8-8cf951f5d359/pulelosoneseteliwazimifef.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5F 5436 bytes
SHA-256: 7668902db81a3a8f4871111e21d43ef8beb8ca3ee6b574b7e81aa9b3e7a5f77c
font_01_sfnt_off00011cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF1 11120 bytes
SHA-256: c90b4b164a2e256ed16ca5e3ee2e2933e9dc7b6d36cfbfac7853357796ccb3c3
font_02_sfnt_off0001431c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1431C 16480 bytes
SHA-256: cfb81015ccc48e34430eefe4798d2ceb6eb399c3071117bcf8196ad78feeec32

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