Malicious PDF — malware analysis report

Static analysis result for SHA-256 0971313c318d7c22…

MALICIOUS

PDF

87.2 KB Created: 2021-02-28 18:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 015f57778e632402e915a2fb270a3890 SHA-1: 9dca437ac192e3995d7ed5aa0e47f997c1f837e5 SHA-256: 0971313c318d7c22f3bb4b7c098e171270d9122da66d9f4e0e87bf5eee3fea3b
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable domains and are associated with redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or scam attempt. While no scripts were explicitly extracted, the nature of the links suggests a potential for further malicious activity upon user interaction, likely leading to credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=ir+extender+for+cable+box+best+buy In PDF document text
    • http://mojadejazisapa.sportsontheweb.net/will_poor_countries_ever_become_rich.pdfIn PDF document text
    • http://hdsamara.ru/bejipajxnf6.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/GGFFid8/flights_from_london_city_airport_to_dublin_ireland.pdfIn PDF document text
    • http://yewes.space/fakegisewasivukobikanogs8j7.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/36553400822.pdfIn PDF document text
    • https://xadidevoki.weebly.com/uploads/1/3/0/8/130873902/fagodoxom.pdfIn PDF document text
    • http://honbiz.pro/world_war_z_xbox_one_multiplayer_gameplay949id.pdfIn PDF document text
    • http://moneymaya.site/fitepewagizuviwakodagoka612ql.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/hdicqCJ/download_zombie_age_3_uptodown.pdfIn PDF document text
    • http://liolika-rsya.ru/fate_stay_night_realta_nuacomr4.pdfIn PDF document text
    • http://kompledom.com/puguboloto2p2mo.pdfIn PDF document text
    • https://kojezuduw.weebly.com/uploads/1/3/5/3/135326104/sizitufefuga.pdfIn PDF document text
    • https://sexewowoko.weebly.com/uploads/1/3/0/8/130873923/070f2.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/77493054864.pdfIn PDF document text
    • https://tuwopabawebude.weebly.com/uploads/1/3/1/3/131382790/42f1cdcb243b32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubiluwetij.myartsonline.com/first_90_days_in_leadership_role.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001012c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012C 5264 bytes
SHA-256: 03d683061b541723f1e3b6d2c03ab807f6d1d079e7925c22844a0247dfe8dbcd
font_01_sfnt_off0001132d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132D 11444 bytes
SHA-256: 36984b4cb65f80d7dd92e7c904a1658ada23a47c0d912a05e8a54a87689a495b
font_02_sfnt_off00013a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A59 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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