Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fe66449dc6b194…

MALICIOUS

PDF

93.7 KB Created: 2021-03-23 00:28:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 883ca0fda8440d30d786ce2841fc182b SHA-1: e93549cd32cfa4c08d68d981913aa735a1de3fcc SHA-256: e1fe66449dc6b1945208cda1569a6970ce0d1a87ac033a25822921f0b917320c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO poisoning attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://botokaw.ru/strik?utm_term=continuidad+de+los+parques+analisis+quizlet PDF link annotation
    • https://cdn.sqhk.co/vuritukupus/fgcjje5/dezapimovotetopugikevisu.pdfIn PDF document text
    • https://puriruwuz.weebly.com/uploads/1/3/5/3/135395363/kaxumuzezej.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/dwicijV/reversi_free_math_games.pdfIn PDF document text
    • https://maparezoja.weebly.com/uploads/1/3/5/3/135321508/punabededuf_sumiziwawu.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/gjphegg/police_officer_age_limit_florida.pdfIn PDF document text
    • https://kilexudu.weebly.com/uploads/1/3/5/3/135347894/b462598b2f6b2.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/kurazuladiduxezo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruzoguniwu.epizy.com/75845778341.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/forma_de_comunicacion_primeras_ciudades.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/who_are_the_main_characters_of_the_tempest.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/45557459832.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_fed5eaf23ea642699d89d0ed2da3f638.pdf?index=trueIn PDF document text
    • http://luderaguzafa.epizy.com/how_long_is_ham_radio_license_good_for.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/ryerson_business_management_marketing_major.pdfIn PDF document text
    • http://wasupudunufol.rf.gd/dalakatigutuje.pdfIn PDF document text
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_71b5ae736e1e45e2bff959be9e9f769b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remeranexe/16688334520.pdfIn PDF document text
    • https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_5933b874c99a408691f309a74138556a.pdf?index=trueIn PDF document text
    • http://nunivigel.epizy.com/buwisimugerot.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/allianz_travel_insurance_claim_form.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_off00012c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C84 5032 bytes
SHA-256: 5e04505a6d2f1fc652ccb437fd3f5388096117763a80d70e5f108eb82d0580dd
font_01_sfnt_off00013db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB0 13028 bytes
SHA-256: ed8acefc0672cbda3010465eec53d8641b4ba1dc5fefb6b54dd6fc0cc4b0d859

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