Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c75806e85333554…

MALICIOUS

PDF

85.5 KB Created: 2021-03-11 07:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 38c3083592f9c1a761f768c2a6234bbd SHA-1: ccdb5531e29ef6c025c386c1ff15909bc3f53e72 SHA-256: 6c75806e853335542e3a8918a25c8881868e46c8d8a8aea91e9ad66828187a48
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, many pointing to disposable or unknown domains, suggesting a link farm or redirection scheme. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a deliberate attempt to create a large number of links on potentially untrusted hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/aws?utm_term=made+to+stick+chip+and+dan+heath+summary PDF link annotation
    • http://tovelksa.website/wivowumijumilitaxigabiviw5tlr4.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/how_to_raise_a_genius_child_book5v76i.pdfIn PDF document text
    • http://daating19.site/josanisupidedazes63cp.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/how_to_unlock_a_sentry_safe_lock_box.pdfIn PDF document text
    • http://im-marceting.site/how_deep_is_lady_bird_lake3k5cl.pdfIn PDF document text
    • http://kindraretterath.com/najifivapelezitazufowone86sr5.pdfIn PDF document text
    • http://padojobimo.mywebcommunity.org/applied_mathematics_1_mumbai_university.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/forrest_fenn_treasure_finder_lawsuit.pdfIn PDF document text
    • http://bullbananavannaone.xyz/belajar_bahasa_inggris_dasar_grammarwosh5.pdfIn PDF document text
    • http://present-mag.ru/gafekojoxqpez.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/f57d1287-08bc-4d9d-8615-663be1d39aba/52423835552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98dcf32-3533-4493-9345-46d59a2ea879/34921111235.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/el_pentateuco_pablo_hoff_completo_gratis.pdfIn PDF document text
    • http://tedumadedin.epizy.com/chunari_chunari_song_video_tinyjuke.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/lofariwavosarabem.pdfIn PDF document text
    • http://xidalagep.myartsonline.com/pibatidozilo.pdfIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_cfe466cf2e134c35b49d2080a492f617.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fa5d72-adc2-4261-ba88-0154667f761a/73337152158.pdfIn PDF document text
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_ef3e8e6e06a94f5fafad5816e02c76ed.pdf?index=trueIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_6253c8bcf61447989b1aa17ddfcd6f52.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a995647-423e-4f69-826d-7318b6b28fb3/average_salary_of_machine_learning_engineer_in_dubai.pdfIn PDF document text
    • http://wemubivoparuf.epizy.com/andriette_norman_songs.pdfIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_69be3e89b290486dab385f1878346356.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_off00011235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11235 5452 bytes
SHA-256: fb3442a888d6827311d6695416bbb98ea6c7cbff88df72f0cf354a35b463c3eb
font_01_sfnt_off000124ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AB 10604 bytes
SHA-256: 6b296336151d8f683a3317d5eb8fe956e1b5d4dc989a4656ce42792c59c7642e