Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d89a206ade8a6c8…

MALICIOUS

PDF

75.7 KB Created: 2021-03-07 20:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 088fe79392c500cc19d66911d294369f SHA-1: ea7dddaf41a8854c7c0f0c95f4285e13cbdb0c3d SHA-256: 7d89a206ade8a6c889bff15158001b6ef63d57bb60b844252244f108e64ce293
126 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, but the primary malicious indicators are the external URLs and the heuristic firings pointing to malicious PDF content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=football+training+drills+video+free+download PDF link annotation
    • http://afracheat4.xyz/19483953528vt55o.pdfIn PDF document text
    • https://cdn.sqhk.co/donaxewon/hdVtgjg/maxpreps_football_stats_app.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/hghashd/java_netbeans_8_tutorial_for_beginners.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/47147378698.pdfIn PDF document text
    • http://getcreditcheck.info/suzuki_250_quadrunner_oil_capacityhbv5x.pdfIn PDF document text
    • http://poradoit1.site/180_days_of_reading_for_first_grade_answer_keyvj7n9.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/gesavowu.pdfIn PDF document text
    • http://magazok.top/boselesuxezodtbz2f.pdfIn PDF document text
    • http://megalit-korolev.ru/30682599825gcbea.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/how_to_calculate_estimate_in_civil_engineering.pdfIn PDF document text
    • https://gibiboxovozigux.weebly.com/uploads/1/3/4/7/134722082/wexalurut.pdfIn PDF document text
    • http://investmag.org/wawenegakuzif65mz.pdfIn PDF document text
    • https://tasoxagizuj.weebly.com/uploads/1/3/4/7/134734804/gemarotilafob_fitusi_tipisux.pdfIn PDF document text
    • http://creditreportusa.info/82695932688gtf0o.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/vaxoretujuga.pdfIn PDF document text
    • https://ganuwikudafo.weebly.com/uploads/1/3/0/7/130775291/6ddc7bea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_44cc66e3f42b4f998c0cc49b79c5cc6a.pdf?index=trueIn PDF document text
    • https://cf587a47-7c2f-4f55-8bbb-21a4c73503f7.filesusr.com/ugd/8ea597_03fcb61df9d747e786f7a66c0d105c46.pdf?index=trueIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_00b87fc5014f411c950e27caf6b463c1.pdf?index=trueIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_344b4413bdbc48d397767314c42d5934.pdf?index=trueIn PDF document text
    • http://pudosuvosav.atwebpages.com/radub.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_4eb226b6d7014badbf41378b75916c10.pdf?index=trueIn 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_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 5324 bytes
SHA-256: e1f3a9172f8782516fffdd554e9bad26cfbb92aca6e048152befcc0bb6fbdc2d
font_01_sfnt_off0000fde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE9 10456 bytes
SHA-256: e4fd25845414c9a5cde0b3ae1bce4aba8644815a741c9288d35fe82cf7c408af

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