Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f17e6b2e20aa4e7…

MALICIOUS

PDF

143.6 KB Created: 2021-03-12 12:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2a2a5c45df874a2ce702a7ddd8fb07cc SHA-1: cf4b4a74c857dfa1bf8491114c6403801e8dd117 SHA-256: 0f17e6b2e20aa4e74deae2a76cdfb52e6fd131feaeeedbdb074d605f47824443
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as legitimate files, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for distributing further malware or conducting phishing operations. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://nipisod.ru/award?keyword=catalogo+ngk+mexico+pdf PDF link annotation
    • http://nutapobo.iblogger.org/82449976643.pdfIn PDF document text
    • http://shishkin-seed.xyz/bovafelotufozat1f6dl.pdfIn PDF document text
    • http://shoppermarket.online/231904378685royn.pdfIn PDF document text
    • http://salestore.pro/slaughter_2_prison_assault_apk_obbgqwor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_ac4ab0ea095a4b28b547c21685a7962f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polexebuj/21240466041.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_4e930c2436524fd895cbb5885c59aa9e.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_be2662394e5e4b0b95bc6e6a93683394.pdf?index=trueIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_09fc4636474d4e5f945f3982ddcdf62d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesotat/character_traits_worksheet_for_4th_grade.pdfIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_57b939c7782d40de8bc168c2cdf09f0e.pdf?index=trueIn PDF document text
    • http://bofutezexo.rf.gd/40273356889.pdfIn PDF document text
    • http://rovuwuruw.epizy.com/social_media_definition.pdfIn PDF document text
    • http://jokipuzovorije.epizy.com/non_disclosure_agreement_template_uk.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_c8df0c41eea944c188e54424b41b97bd.pdf?index=trueIn PDF document text
    • http://lutewefopuv.rf.gd/gunirekutonemasevede.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/buzuvosumufusufipegesuz.pdfIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_848dc6abebe94bcd96a2534b987991d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/taturi/atheros_ar5007g_driver_windows_7.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_1ed85406efd94226baa86a01501aedcc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/35950911887.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/58928220303.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/greased_baking_sheet_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/23682294742.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cf0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF0A 5236 bytes
SHA-256: 058bde303dd90301afd4564252f0bc5adc226ac8a94b304e00ddb7379ba9dff0
font_01_sfnt_off0001e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0D7 18900 bytes
SHA-256: 2c203ca93767a7f1a392b74af174a02e9081761d0bfe373f91ed8b7b5e320957
font_02_sfnt_off00021929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21929 16616 bytes
SHA-256: 87bb59e6b957ce6ed7a8fb14ec3281d302c6d7d409fe032fc516675b31191539

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