Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fba6365ad23e8b…

MALICIOUS

PDF

80.9 KB Created: 2021-03-10 07:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3f59828e63ce86ad385112da0429829c SHA-1: d3d962279e9ab234ce6a701f14359fd03e7ef923 SHA-256: 48fba6365ad23e8bca9506b20c1f6a55a70b4d4545b42b50268fb5857a76e5ad
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

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://golowaki.ru/wix?keyword=double+displacement+reaction+lab+answers PDF link annotation
    • http://woodbonus.net/ketogenic_diet_indian_vegetarian_recipes3gt0d.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/gjh6iiL/34035019641.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/ping_pong_rules_does_the_ball_have_to_bounce.pdfIn PDF document text
    • http://helpcopyright-service.com/sucedio_en_manhattan_pelicula_completa_en_espaol_latinod0zkg.pdfIn PDF document text
    • http://jakusavu.sportsontheweb.net/wabamuxivirojidufovef.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/Tjjhjgi/kaluz.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/what_is_the_meaning_behind_nessun_dorma.pdfIn PDF document text
    • http://timelessdecorum.com/wupewisirixegizizavide7udjd.pdfIn PDF document text
    • http://xebupado.mypressonline.com/why_does_my_lg_top_loading_washing_machine_smell.pdfIn PDF document text
    • http://rosativiwam.mypressonline.com/nukivivowepivilosar.pdfIn PDF document text
    • https://cdn.sqhk.co/sejarepezibo/TWgfgOO/7731715606.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/what_is_light_olive_oil_made_of.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/gipajesugobumiza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_8ab9034df0bb4ced9c26a075de768eaf.pdf?index=trueIn PDF document text
    • http://teladanizuv.rf.gd/88252998241.pdfIn PDF document text
    • https://7ae774ad-b64d-4473-a0b1-aa0db1e39e83.filesusr.com/ugd/3e7897_6810a5c03f5549aca2ad1ea1e3258a77.pdf?index=trueIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_0afcad17ec194766817274c45a81fd8d.pdf?index=trueIn PDF document text
    • http://wogurep.epizy.com/ark_wyvern_egg_hatching_guide_ragnarok.pdfIn PDF document text
    • http://bofawujataja.epizy.com/hp_officejet_4630_error_code_0xb80003e8.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE887 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000f96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96E 5452 bytes
SHA-256: 9da33c965fb583093ce49e92d33c4ae6d123e62bf7ccf68c84c51e3001a24a10
font_02_sfnt_off00010be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE9 11788 bytes
SHA-256: 5aa7e14e049b920ba1231d4eb5b92b2683b4911c19839d2185d6a0c88303d835

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