Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c786912c5e92f1…

MALICIOUS

PDF

81.9 KB Created: 2021-03-17 09:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f4d0bed69ab751a4b777552a615180c6 SHA-1: b25d7caedb2be9df321973ac57377a7fa25f2374 SHA-256: 94c786912c5e92f1c447ead39bbc59076d3e3b32e87e541656d2043f484b4a4d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains a large number of external links, many of which are likely part of a link farm designed to obscure the true malicious intent. The primary malicious URL identified is https://druttle.ru/award?keyword=armies+of+the+lord+of+the+rings+book+pdf, which is used to lure victims by appearing as a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://druttle.ru/award?keyword=armies+of+the+lord+of+the+rings+book+pdf PDF link annotation
    • https://gekibevuzoz.weebly.com/uploads/1/3/4/5/134503907/xoxikozo.pdfIn PDF document text
    • https://feketofemij.weebly.com/uploads/1/3/1/4/131452988/2f44e3346dc7720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_6040bb170af2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426423/normal_5fee7fef5225c.pdfIn PDF document text
    • http://instup.xyz/200_amp_manual_transfer_switch_cutler_hammeraiq1z.pdfIn PDF document text
    • http://esmoney.site/atoz_er_apk_apkpureb46l1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393044/normal_5fcf3079f2830.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/7646229.pdfIn PDF document text
    • https://zudejuzire.weebly.com/uploads/1/3/2/6/132681250/biposojamujatafim.pdfIn PDF document text
    • http://pokemonrivals.online/472132660965zdos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/54560235921.pdfIn PDF document text
    • https://770603ce-cae8-48b7-b4e8-6e15b9dac1cd.filesusr.com/ugd/e975af_f3c0b90f0f494aa0810d262d3d52d4d3.pdf?index=trueIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_7f14c53371ef4e72af196836889d4bed.pdf?index=trueIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_d5df2a586869489aaf34fdac114fc66a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/8008933218.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_1a9ca94d694f408a9fa9e50d52872b00.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xalasawu/president_forever_2016_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/airplane_mechanic_salary_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/how_to_find_ratio_using_calculator.pdfIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_f5d2df64495f4093995c7dbc4f0af0fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niporofez/articulate_storyline_3_template.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/gigubogawimobirodari.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/el_arte_de_amar_libro_completo_descargar_gratis.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_off0001010f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010F 5436 bytes
SHA-256: aeefae1efc7c69945c419cc297c211bfadc102d06ecc8953408ff8ca93975688
font_01_sfnt_off00011362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11362 10944 bytes
SHA-256: a12036a01a2a001d3fc289dde8e587d0fd2d7ab440dd0c70161093d3ee804110

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