Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f67aef981c87eb…

MALICIOUS

PDF

78.6 KB Created: 2021-05-30 18:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6504ba739dd43538e35bb27d71619c43 SHA-1: 6b2917bcdaaaed91b3b0a23bbbbdc683299c0c2f SHA-256: c9f67aef981c87ebf640f52ab5040cfd533efb1cf2f7e1bbe3788ca56bcf7a99
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were extracted, the PDF structure and numerous external URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=navy+football+playbook+pdf PDF link annotation
    • https://zepemotofilizag.weebly.com/uploads/1/3/5/3/135399015/3818135.pdfIn PDF document text
    • https://zapikomamotal.weebly.com/uploads/1/3/1/6/131606370/xizofe.pdfIn PDF document text
    • https://winomawapaba.weebly.com/uploads/1/3/5/3/135334931/2110941.pdfIn PDF document text
    • https://wutiboduselojo.weebly.com/uploads/1/3/4/6/134665342/venunisovaret.pdfIn PDF document text
    • https://wevinosoz.weebly.com/uploads/1/3/4/4/134444327/3398154.pdfIn PDF document text
    • https://pibofarijefi.weebly.com/uploads/1/3/4/6/134648305/4554187.pdfIn PDF document text
    • https://vemomomofaj.weebly.com/uploads/1/3/2/7/132740815/8116393.pdfIn PDF document text
    • https://kodepifaz.weebly.com/uploads/1/3/4/7/134705681/junefimofexoki.pdfIn PDF document text
    • https://fatofexar.weebly.com/uploads/1/3/4/6/134687548/fapuvoxumitirazep.pdfIn PDF document text
    • https://jodulimije.weebly.com/uploads/1/3/4/7/134732884/cdbd0751557fd.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/b873d9cb-5718-46bc-a901-00bab84fdd1a/sap_accounting_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2253352-a7e9-4399-827d-3527eb95951a/istatistik_1_zml_sorular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11dfa523-8e55-4582-9407-fbc53838d5c6/sejitonilasene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47476fe-4f6b-4501-9209-19ac0cc29584/frantz_fanon_cognitive_dissonance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6fe52a-d4d9-406d-a7f9-a129db2ac294/merit_badge_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9021901b-16e9-454f-93e8-c36f1ba5d26f/how_to_draw_a_dragon_easy_step_by_step_cute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4015b1f-1f94-4cab-ae76-bbe1bff99725/lotomoxuvevoruwozavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155d5380-3cc4-4b70-a7dd-a19c95936520/zogubumuputulovata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1dfd41-ceb8-4cb0-9171-9b0ba5baf73c/how_do_you_set_a_clock_on_a_hamilton_beach_microwave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1fbc99-5554-45d6-81e6-157f8167a46c/95398970487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b82f196-82be-47f2-a093-5597b87d831b/how_to_take_ecg_on_apple_watch_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28065216-d943-45de-83cb-3db49806d993/rugarina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052d1490-70c4-4713-b3cb-b7353aee40ee/fototuzarelesef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da9063a-b297-4a9b-9a58-a0d59d392be6/zoperulane.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_off0000f53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 5096 bytes
SHA-256: 940f75ac92df55960cee036bfcab7bc56329602ad9ff31b7fc19fa6818979ee5
font_01_sfnt_off000106c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 11080 bytes
SHA-256: 3978cd2ec27ba8826ef815a3eec44af34e8c38657795631bf20cd5e055a5b48b

Open this report in the interactive analyzer, or submit your own file for analysis.