Malicious PDF — malware analysis report

Static analysis result for SHA-256 765c2fd16ed5df29…

MALICIOUS

PDF

95.6 KB Created: 2021-03-20 22:52:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 63dffdcc02070b666f1bd265eca5012d SHA-1: d6f434eff2dfe0f3c22f08ed27a0bed9236f2ddf SHA-256: 765c2fd16ed5df291e10539bf5cd42cf872e65ba13a6a15ea86cf9c8ada55b43
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of 'knife making blade templates' in the document body and URLs appears to be a lure to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/123?utm_term=knife+making+blade+templates PDF link annotation
    • http://shoop-fr.ru/download_game_idle_light_city0ncpc.pdfIn PDF document text
    • http://prizinsta24.site/fexipul57pt.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/chggejc/10431623843.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/jjivmjg/78924490481.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/29656105237.pdfIn PDF document text
    • http://teksalle.xyz/verepuwatfwk2.pdfIn PDF document text
    • http://profer-opt.ru/yuntum_marathi_movie_songs1pjgz.pdfIn PDF document text
    • http://converstarget.ru/14797682661hrk8n.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/XjjrdeW/house_building_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/Stb1pK7/64402140683.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/jgYUKhL/coach_mobile_homes_for_sale_in_florida.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/24606915907.pdfIn PDF document text
    • http://ductsunlimitedins.com/how_to_teach_a_child_with_hearing_lossy8ucz.pdfIn PDF document text
    • http://trackcreditscore.info/libro_por_el_placer_de_vivir_cesar_lozano_gratisberiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_f2138d355fe341898768960374b2a5f4.pdf?index=trueIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_b90eec9978c54609bf04c13188a39d1c.pdf?index=trueIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/tegotutofemubapilix.pdfIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_b269cfed744544e2a2c622cfe558e5be.pdf?index=trueIn PDF document text
    • https://e5aadbcf-511f-4ee2-989a-4410a22eeed0.filesusr.com/ugd/64930c_69f55759a6934a3098ff8108d03c7aae.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_off00013a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3B 5440 bytes
SHA-256: a9b9f1135a8cf2d7565d34c8b59a2c5152c2b2826a8d44ba2310777fcd67ba87
font_01_sfnt_off00014ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CA9 10816 bytes
SHA-256: 133277b6c63edaf6059a15d85d268e6646df91941eb9ad8f2ed321b44c42b2ab

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