Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f3c213adc9e63d…

MALICIOUS

PDF

87.7 KB Created: 2021-06-01 04:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 029eb6d5b9c11326150417d43f59495e SHA-1: 228a1e14971c85bf3fef1b0f3ca9eaefcadea79b SHA-256: 29f3c213adc9e63da3e80baba5eeb101ebe8ab4cb085b053cac6ea50960ff3f4
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/pbw?utm_term=war+room+prayer+journal+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385647/normal_602298120a454.pdfIn PDF document text
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/6746290.pdfIn PDF document text
    • https://panodetis.weebly.com/uploads/1/3/4/6/134669877/26fc411.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369143/normal_5fff7cbea454e.pdfIn PDF document text
    • https://tovuwopisivid.weebly.com/uploads/1/3/4/6/134640328/e091397eb5d.pdfIn PDF document text
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/6422703.pdfIn PDF document text
    • https://dubekanenek.weebly.com/uploads/1/3/3/9/133997540/71571.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368781/normal_5ff1f54232c9c.pdfIn PDF document text
    • https://pifelitasa.weebly.com/uploads/1/3/5/3/135350032/tezulapupelewavinozo.pdfIn PDF document text
    • https://xotukowigadane.weebly.com/uploads/1/3/4/6/134683058/7196781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_5fd2c4cb571c6.pdfIn PDF document text
    • https://regaxitorosujuj.weebly.com/uploads/1/3/7/5/137518825/dee8da8749f.pdfIn PDF document text
    • https://joxobupapi.weebly.com/uploads/1/3/1/4/131454586/dogojaxelu.pdfIn PDF document text
    • https://zipawesijapa.weebly.com/uploads/1/3/4/4/134494223/5732785.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sepaxebi.pbworks.com/f/algebra_worksheets_for_grade_6.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144426207/obeb_okek_soru_zm.pdfIn PDF document text
    • http://wekibivu.pbworks.com/f/malena_full_movie_download_in_hindi_480p.pdfIn PDF document text
    • http://vadibun.pbworks.com/f/pirates_of_the_caribbean_full_movie_in_tamil_part_1.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144412254/40764052749.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/solucionario_microeconomia_pindyck_8_edicion_gratis.pdfIn PDF document text
    • http://masawumel.pbworks.com/w/file/fetch/144428121/chase_deposit_slip_template.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/duvatisunutedirigogina.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144423459/fke_kontrol_ilkokul_slayt.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off000107d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D3 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off000118ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BA 4976 bytes
SHA-256: f8da48f7bb5cb54b3d9a4b80e1dcaa0eef611b64707a0a5d824260f22a40215c
font_02_sfnt_off000129a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A7 11300 bytes
SHA-256: d37632a18ef6075025771ac36c24d656dffcc8386a54f903bee2f46edcfa5940