Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe63cdae971cc532…

MALICIOUS

PDF

77.1 KB Created: 2021-03-07 21:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b5a28d92e9476e8fac627d2863887cfb SHA-1: 015591ad097243d1c4da796110a5caf7cd51ce96 SHA-256: fe63cdae971cc532e77646da8b1b6ba16c4bcee9e67ef16b6b2339b2e026a333
126 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It contains numerous links, including one to 'kuzutuzo.ru', suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains keywords related to gift cards, a common lure for phishing attacks.

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://kuzutuzo.ru/wix?keyword=free+google+play+gift+cards+no+verification PDF link annotation
    • http://insurancecarusa.com/morulo9csuy.pdfIn PDF document text
    • http://options.expert/how_much_does_a_3_ton_air_conditioner_costcqknj.pdfIn PDF document text
    • http://puwofipafemuvif.22web.org/kuwuninene.pdfIn PDF document text
    • http://nijowefipegivu.iblogger.org/effective_oral_communication_skills.pdfIn PDF document text
    • https://vogifidawavuda.weebly.com/uploads/1/3/1/6/131636702/minigotokixig_xadujegad.pdfIn PDF document text
    • http://fionainthefield.org/latest_android_version_for_samsung_galaxy_j7rpkhp.pdfIn PDF document text
    • https://digaporabanezaf.weebly.com/uploads/1/3/4/6/134689005/4811946.pdfIn PDF document text
    • http://lanaxed.iblogger.org/apk_codashop_terbaru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_33fe33de2bd446848db3268b4ae84469.pdf?index=trueIn PDF document text
    • http://xiwaresijo.epizy.com/21107288253.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_6f0c15a552954e1eb26046afb3ef9dc6.pdf?index=trueIn PDF document text
    • http://duxemebuwejaw.rf.gd/51722299941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/327d8ab6-e842-4e96-bd9a-6d064cafd69f/82941480319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64fd4ea2-1153-4bea-8662-4845577edbf9/what_is_a_behaviour_support_plan_in_childcare.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_cf5c553c78ce47cabc37ac940f5f803a.pdf?index=trueIn PDF document text
    • http://fupizud.rf.gd/barbie_doll_english_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1964c9a5-1996-438f-9dd5-1d883c899a15/manual_de_gps_garmin_12_xl_en_espaol.pdfIn PDF document text
    • http://velefaluzi.epizy.com/sexibopofapur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16C 5228 bytes
SHA-256: 71016342c5b95c08fdd5ba44a43e5a6f537b89524f7c490c356771a7f3385c5b
font_01_sfnt_off0000f34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34E 10908 bytes
SHA-256: e622f7dbecb79c1866dedb5afb6fb6012fe1faa7d21493d007f7af19f05fac5e
font_02_sfnt_off00011861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11861 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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