Malicious PDF — malware analysis report

Static analysis result for SHA-256 223dabf1a1350bc9…

MALICIOUS

PDF

73.8 KB Created: 2021-03-28 23:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b86491dff89be7a93779b4f27ccb8278 SHA-1: 043ca65dfa8f5b7aec94c30e98f5f289fe68be45 SHA-256: 223dabf1a1350bc91109eb1e3605880434dae36f702aa777e8c978c3338f7119
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document is designed to host many links on potentially untrustworthy domains, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://dugedepap.ru/award?keyword=greater+ritual+of+the+hexagram+pdf PDF link annotation
    • http://bagomebefekixob.getenjoyment.net/gelesafepegemori.pdfIn PDF document text
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/e66c6d7455745eb.pdfIn PDF document text
    • http://smartradiobf.ru/fizuwafigorife3ga1x.pdfIn PDF document text
    • http://sysfix.ru/7921219514el0jr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385614/normal_600022e58f3ef.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/vabigavamodopoxidunubis.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/tp-link_n750_default_ip.pdfIn PDF document text
    • http://firstreadersclub.com/types_of_chemical_bonds_worksheet_answers_cacl2g62p9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371787/normal_5fcc9b586dcb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454424/normal_6056fa2fa689c.pdfIn PDF document text
    • https://gejosubirimo.weebly.com/uploads/1/3/0/7/130776575/6316196.pdfIn PDF document text
    • https://tukixetijire.weebly.com/uploads/1/3/4/3/134314539/9234180.pdfIn PDF document text
    • https://debimagobu.weebly.com/uploads/1/3/1/6/131637583/edfaf648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5fdb0e08d86df.pdfIn PDF document text
    • https://nujelojebalu.weebly.com/uploads/1/3/4/6/134690198/marerid_liwag_gunojuziso_pomugawijajesat.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/09df70b5-c2d6-48b0-b903-d29d63c2b693/a_night_to_remember_teacher_guide.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/how_to_build_market_intelligence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7344fa50-6c62-4e82-b392-79008b13093c/is_love_is_a_fallacy_a_logical_story.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_off0000e324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 5376 bytes
SHA-256: ccd2e06b9a225d3c79b652b9ddf9ac3bd51cb3b61b9e46ff18a618e773cbf50b
font_01_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 10616 bytes
SHA-256: 858d0e2d124d79a9634ddbc5c04eb6c2e26e093be93a8268e9fe1bf54aff3307

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