Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5298bd61d1e9ad9…

MALICIOUS

PDF

80.4 KB Created: 2021-06-18 12:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 25d79d8af5f6bb15c64f1cc47668c852 SHA-1: 086afc32383cfdd616c104fa12e0b4118e1e42f2 SHA-256: d5298bd61d1e9ad96af1a9154d96964604b759f7a4411e6465f2920d5541be6d
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, specifically targeting form upload directories. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns suggest a downloader or redirector role for the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5501

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e679dbd9da---bogidunodijotoza.pdf In PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28b4c4f7a---zumifefinakerusepuvopodi.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c313a8f8c8---pakegukurowusiv.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/5f41edb560c82cdc03d2ecf89ff42b8d/44889192317.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/23712421846.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/52036756409.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b6128bf14d1---88433484202.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/302c0689e04361bd34c6b06cd8b36300/legejoxabinawebe.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/5003108a766b387cbfd06e244e374313/41583243714.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/a37af0b252956cc29fab4698f20c6724/wasuvawijubobejaxupedotip.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2e174f633---xugujinopa.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/20968449512.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/2da24edcf4113f93e6fdb779460e7bb9/62973103300.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/wexozubukuvisorowowikop.pdfIn PDF document text
    • http://thaide.org/userfiles/file/65209161837.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a2624db4e6c---palimuboxopufor.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/1e4dd9b627b129f4f74e7b263f9543da/36833516179.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://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=indian+marriage+biodata+word+format+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 5108 bytes
SHA-256: 795680bcda646afe057496dfb0c4b94cd22dfd27193f85e3ae91b559f845e9b4
font_01_sfnt_off00011067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11067 11308 bytes
SHA-256: 17d6dc9b0c70cb5c92c857c8c5450cc3efaba04d051f865af67c82e5c21a20a3
font_02_sfnt_off000136fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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