Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f32efc21376518…

MALICIOUS

PDF

74.0 KB Created: 2021-05-31 01:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1321ca9270c22a78aa92b0f2ead41aba SHA-1: 20b6f89328c83c088008caed43e7de76a3172a99 SHA-256: 63f32efc21376518dc45fba0475ed49e33a5d961aad4ed18a651fdffdc34d5b3
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the document's structure point towards an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://soxebez.ru/strik?utm_term=how+do+you+file+a+quit+claim+deed+in+florida PDF link annotation
    • https://toxujubew.weebly.com/uploads/1/3/1/4/131437446/gitap-kuniz.pdfIn PDF document text
    • https://zivuxava.weebly.com/uploads/1/3/5/9/135991205/vuwotu.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/3fdcf.pdfIn PDF document text
    • https://sususijofazitut.weebly.com/uploads/1/3/4/4/134462406/e92828a63fd53ff.pdfIn PDF document text
    • https://winilogixibofop.weebly.com/uploads/1/3/1/4/131408061/880ed.pdfIn PDF document text
    • https://sipasegeremiraf.weebly.com/uploads/1/3/4/4/134404187/3bbed337.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371553/normal_6005e5747da8c.pdfIn PDF document text
    • https://jijubukaxujofi.weebly.com/uploads/1/3/4/8/134892288/a892c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451950/normal_606115acce558.pdfIn PDF document text
    • https://jogijomovap.weebly.com/uploads/1/3/0/9/130969693/5237693.pdfIn PDF document text
    • https://rupunapu.weebly.com/uploads/1/3/4/3/134354814/vuwowapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_601ce3d70fb7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_5fd13dac14d5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408862/normal_5ffea5055c60b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb44fb1b-34ca-43d2-95a5-f067ae738312/pulesuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7326f1ad-79c7-45c4-af0e-715134c0969c/what_does_the_tap_symbol_mean_on_a_daikin_air_conditioner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c0dad04-9e64-4c84-a31e-a37c9d9000a3/ejercicios_resueltos_mruv.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E2 5272 bytes
SHA-256: 392c078369d876d87d989e6b770809d8be845db34c99bbf226bdf2da057bc71f
font_01_sfnt_off0000f3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 11464 bytes
SHA-256: 28059894559f8fef82706a223180761c942ce41b57e53291255ffebf9bb472c2

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