Malicious PDF — malware analysis report

Static analysis result for SHA-256 932dab01b6861884…

MALICIOUS

PDF

71.4 KB Created: 2021-04-13 15:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a270ab0ee034394820efca4bcc330730 SHA-1: e21f59b7c2b6e7cc97faf8126a261968ddeae653 SHA-256: 932dab01b6861884a80081d9353b4b1dfaa5a0c7d191cbc2b7b09e7dd2a8b8e8
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern, indicating the document's purpose is to host a large number of links for SEO manipulation or to distribute malware via these links.

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://xajibur.ru/strik?utm_term=aplia+homework+perfect+competition+answers PDF link annotation
    • https://ganeravis.weebly.com/uploads/1/3/1/3/131384604/duwuwam.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/5478683252.pdfIn PDF document text
    • http://bixekakazozerol.mywebcommunity.org/28801187010.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/how_to_play_2_player_on_goat_simulator_ps4.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/44355687014.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/21037509044.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/7712299.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/2ijicgi/12141888065.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/ihaflUk/ripakivagukinulaxirep.pdfIn PDF document text
    • https://cdn.sqhk.co/xurinuwame/c1nG6jd/whatsapp_status_video_app.pdfIn PDF document text
    • http://gbo.guru/tamufivsktyb.pdfIn PDF document text
    • https://cdn.sqhk.co/vajirasavuz/dhjjcMT/turbocharger_wastegate_solenoid_function.pdfIn PDF document text
    • http://chambrely.xyz/adorno_dialektik_der_aufklrung_zusammenfassungc8lhy.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/32e4417a-11d3-4877-bd78-953bac976e0c/coleman_5355_lantern_battery_replacement.pdfIn PDF document text
    • http://susabumo.atwebpages.com/amls_2020_2da_edicion_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e353c0f-c48d-471a-a231-699450f92100/sketchup_make_2017_free_download_mac.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/jafegakipezilekobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4d4861-6a53-463b-970b-6760dd5eb662/lowrance_hook_5_hdi_price.pdfIn PDF document text
    • http://wugetad.myartsonline.com/litotudizenuronidosefel.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_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 5400 bytes
SHA-256: 1d5c3af56ad11db47fdeb3b15111e12c3322c565ead8f35a0c07d17aee6105d1
font_01_sfnt_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 11504 bytes
SHA-256: a81eb223b58a0dd3a9d4bc90c88c2d721b30e1f69379bb9bea502237cb2c7d39

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