Malicious PDF — malware analysis report

Static analysis result for SHA-256 15964eb13a8f1c28…

MALICIOUS

PDF

96.3 KB Created: 2021-06-03 14:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 978a29e0221eaa1940263824e874e529 SHA-1: e8e152db65cc2632e07dc8464cfa632eb8c17c11 SHA-256: 15964eb13a8f1c28668c186fe2cd969c3488af70b62220fa313231af0dcaf836
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as part of a link farm or SEO manipulation scheme. The primary URL identified, 'https://huntic.ru/pbw?utm_term=i+know+why+the+caged+bird+sings+poem+summary+pdf', is likely part of this network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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 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://huntic.ru/pbw?utm_term=i+know+why+the+caged+bird+sings+poem+summary+pdf PDF link annotation
    • https://sezavifibeka.weebly.com/uploads/1/3/4/4/134463458/logeb-sexux-zebeganej.pdfIn PDF document text
    • https://majejuwusi.weebly.com/uploads/1/3/2/3/132303270/pededekokeke_finubirufufaj_dukodoxub_duwisulota.pdfIn PDF document text
    • https://sadejakudabad.weebly.com/uploads/1/3/5/9/135965210/xakewoluvujo.pdfIn PDF document text
    • https://xunipemadigorof.weebly.com/uploads/1/3/0/8/130813553/judosideboti_tagawunipon.pdfIn PDF document text
    • https://zunudomulu.weebly.com/uploads/1/3/4/6/134604261/kovoluruwa_kemadokujiwotix_tujojunibuge_vadomegimosed.pdfIn PDF document text
    • https://pinukozemaf.weebly.com/uploads/1/3/4/7/134713375/funis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_6059b38ca7350.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4457279/normal_60b5c80fe8bfd.pdfIn PDF document text
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/aa7dd375a.pdfIn PDF document text
    • https://povewagefafede.weebly.com/uploads/1/3/4/8/134888055/968604.pdfIn PDF document text
    • https://varovofuzurido.weebly.com/uploads/1/3/4/5/134598094/7eb697c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407070/normal_5fffad5ac8d75.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/aeb4c780-3c73-4fc3-a7f1-ff410eed9eb1/how_to_get_thundurus_therian_forme_pokemon_go.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3bed9d-8c1e-4298-9981-cbf49fca2125/casio_pathfinder_solar_watch_battery_replacement.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144497013/would_rather_had_better_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a05b1f73-3f72-4d15-a918-5c75370ac93d/kinuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ddf756-754b-4489-9563-3e4b1f411172/painting_activities_for_8_year_olds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e722d892-692c-49f2-bccb-b09831b66471/mobizemukokinin.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144485097/baml_bamsz_deiken_rnekleri_aratrma_yntemleri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7391d8f1-0a71-4f47-8ded-ce06ada95a73/xonowaligezapop.pdfIn PDF document text
    • http://jozeluwofe.pbworks.com/w/file/fetch/144418983/9.snf_fizik_dayankllk_sorular_ve_cevaplar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6752077-3228-4008-91cc-c0f67c80d3a7/67878591061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de606f7-cf7a-4be4-8190-c00a4c7dea6c/wuwopogezud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e2d817-f035-4e49-9659-abc4713950b9/25312075201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a93acb63-b256-4be4-a7dc-2010bef7e0e0/wahl_replacement_blade_set_wa2559.pdfIn PDF document text
    • http://gozuwef.pbworks.com/w/file/fetch/144509715/what_after_we_collided_online.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_off00013892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13892 5872 bytes
SHA-256: 6340a125d3aaa17bb93ffa38dad4f08ed1ce102b9017b6f17240aba08f364a05
font_01_sfnt_off00014c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C80 10960 bytes
SHA-256: fdf8cf9d400176f32307cbbe867b2c1c24f670546b29b09c5f62e090b62e1142

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