Malicious PDF — malware analysis report

Static analysis result for SHA-256 67134de148d3489f…

MALICIOUS

PDF

79.9 KB Created: 2021-03-10 07:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49013fd1f0ab594756e42e76d197faa2 SHA-1: b178a3f999bbc5b81cac13e69cc2168b4aeeebd8 SHA-256: 67134de148d3489f33fe19347881a983bfa9952fea5a0df87418128f3a537e12
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. The document body mentions 'M50 gas mask price', indicating a potential lure for users interested in such items. While no scripts were explicitly extracted, the heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous external URIs suggest malicious intent, likely related to phishing or driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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.
  • 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://kuzutuzo.ru/aws?utm_term=m50+gas+mask+price
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5fcd9f5e710af.pdf
    • https://mapivabivex.weebly.com/uploads/1/3/0/7/130776319/ponowufolabawi.pdf
    • https://cdn-cms.f-static.net/uploads/4501028/normal_6017746da33a5.pdf
    • http://zumepaposakuf.scienceontheweb.net/bhagavad_gita_quotes_on_death_in_tamil.pdf
    • https://metufudosajaf.weebly.com/uploads/1/3/4/0/134012305/radej_xululirijemir_bisozurero_wudurusanu.pdf
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/vedatizosede-kuvekitetuvu.pdf
    • https://velazidolis.weebly.com/uploads/1/3/0/9/130969689/pawuboterim-vusulef.pdf
    • https://kofitabalu.weebly.com/uploads/1/3/0/7/130775223/1445930.pdf
    • http://jekenufakewe.mypressonline.com/pidegude.pdf
    • https://texelerozalom.weebly.com/uploads/1/3/5/3/135314582/penukizoki-jubabikal-talox.pdf
    • https://fojomuku.weebly.com/uploads/1/3/4/4/134447263/zirit.pdf
    • https://cdn-cms.f-static.net/uploads/4388833/normal_600a6a45b614c.pdf
    • https://dexekuweda.weebly.com/uploads/1/3/4/7/134705305/8505787.pdf
    • http://fajujefa.getenjoyment.net/the_go_giver_summary.pdf
    • https://cdn-cms.f-static.net/uploads/4366382/normal_603815afa336b.pdf
    • https://kumexaper.weebly.com/uploads/1/3/4/8/134882622/beludubenogu_watope_titesinomi.pdf
    • https://vazigawexike.weebly.com/uploads/1/3/1/6/131606690/8084008.pdf
    • https://cdn-cms.f-static.net/uploads/4413118/normal_6047ee0deef0f.pdf
    • http://xonejixa.22web.org/xefanotosejilelozati.pdf
    • https://babifufagisuku.weebly.com/uploads/1/3/4/6/134605010/fafasemoxad-zixozes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rususekobijo.myartsonline.com/porque_estudiar_administracion_de_empresas_yahoo.pdf
    • http://gudanomakorake.epizy.com/afficher_les_formules_excel_2007.pdf
    • http://manosotidokef.myartsonline.com/lutodapalewagiworol.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9aa.bin
49c321992321e69cd1861b2dfb0bac18916bfd75c35d9b40fcd3cb8071997449		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 5556 bytes
font_01_sfnt_off00010c95.bin
50bcc2d84351540c4dd6cfd65a26f82d572f221049acdfe24f7416e41c3ede51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C95 11068 bytes

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