Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73f2eb7cbcd30b5…

MALICIOUS

PDF

83.7 KB Created: 2021-03-27 15:29:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cd74c67af0837c231e4615cd73a54317 SHA-1: 0581e66297936542aeef8af8bb7c95377a402f01 SHA-256: f73f2eb7cbcd30b5bb15444f410a04d2dbc91d793382ee46b67220ae8d52bd5f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=enhancement+shaman+cataclysm+guide PDF link annotation
    • http://bossyonlinex.com/cronica_de_una_muerte_anunciada_pelicula_completa_en_espaol96gyy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445733/normal_60191eec39dce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368251/normal_5fceddb059690.pdfIn PDF document text
    • http://betmoy57.com/bapavolekom0b4xt.pdfIn PDF document text
    • http://samettemiz.xyz/pod_hd500x_vs_firehawk_fx4hw8j.pdfIn PDF document text
    • http://funseeds.site/sony_rx10_iv_user_manual3gszs.pdfIn PDF document text
    • http://zesamoa.online/walter_chilambo_songs6s35v.pdfIn PDF document text
    • http://alania365.ru/percy_jackson_and_the_last_olympian_movie_castblph1.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/telegabafajexaner.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/2011097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_601f799227641.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/zelisojorep_dulisibinebana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5fdf0e8d86fdb.pdfIn PDF document text
    • http://vigastlens.xyz/how_long_will_it_take_to_walk_1000_stepsr0wfc.pdfIn PDF document text
    • http://cosmeteca.com/xupetowozogitojulowj3rip.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
    • https://uploads.strikinglycdn.com/files/4951a226-1e4f-47cd-871b-b11135fb6382/gurodupubigore.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/32935849520.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/insert_zip_file_into_excel_spreadsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf5776b5-87b0-4d62-90fb-7502a07d859a/what_is_taylors_theorem_used_for.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_off0000fafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 5088 bytes
SHA-256: 77484d6c5809b54ba136414f26cd55338d70b66855f3b31a2f0045e6f019a0e9
font_01_sfnt_off00010c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1D 11092 bytes
SHA-256: 4fb7b1a1a28c942cc73c511f307d6c9033aa855ff28c68c55343385202c4746a
font_02_sfnt_off000131b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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