Malicious PDF — malware analysis report

Static analysis result for SHA-256 0649694712f77cf1…

MALICIOUS

PDF

69.0 KB Created: 2021-02-20 04:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bb0a295c02760808a40e75519ae80a88 SHA-1: f22190dee5f7fe25193fbc0f88aa10b6dfe922e8 SHA-256: 0649694712f77cf17ae90dbc28d0e0af19a01851ccc0985f611887a4ccb402a3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, a common tactic for link farms used in phishing or to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs, such as 'https://jeletizasi.weebly.com/uploads/1/3/4/6/134640559/zusanowesi.pdf', are indicative of a campaign to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=g+shock+watch+strap+amazon+india PDF link annotation
    • https://jeletizasi.weebly.com/uploads/1/3/4/6/134640559/zusanowesi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467601/normal_5ff0320874934.pdfIn PDF document text
    • https://linabodaku.weebly.com/uploads/1/3/1/1/131164293/jofinaxezop_mazojobasabos_pubuwoxitapiwe_mokokejodejejak.pdfIn PDF document text
    • https://golizagizaziw.weebly.com/uploads/1/3/4/7/134701046/aeafc9a.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/7794291.pdfIn PDF document text
    • https://xifanelisiwokof.weebly.com/uploads/1/3/0/8/130874433/2182015.pdfIn PDF document text
    • http://daating19.site/ard_live_stream_zdf_livestream76pmz.pdfIn PDF document text
    • https://pemiroma.weebly.com/uploads/1/3/1/3/131383733/tegapavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454546/normal_5fd0f2c10d092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5fd644f5bef00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://momunubaj.epizy.com/theileria_parva.pdfIn PDF document text
    • http://lezezukoxe.epizy.com/fovinigibalikojidobup.pdfIn PDF document text
    • http://poramukuwulaji.epizy.com/gap_analysis_template_powerpoint_free.pdfIn PDF document text
    • http://pifaramurul.rf.gd/garmin_forerunner_110_manuale_istruzioni_italiano.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_off0000d025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD025 5516 bytes
SHA-256: 63312f6ad05cd3087943c9c37eaaf1a3fa099c1883cb8616ceec32156da95aa0
font_01_sfnt_off0000e2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 10816 bytes
SHA-256: 5e24f9e23f20d4b6f22482977ce4f7b78080c75857b7074a9f6e92d9964ba3a5

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