Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae1601f3ae0613b…

MALICIOUS

PDF

87.5 KB Created: 2021-03-04 04:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4e9ee7f87f5f1cf6829b6d0abe5aa6b1 SHA-1: 25e2be69eea652939b1bc415caa3e0acfb449fce SHA-256: aae1601f3ae0613b64612877a14f9cab9eb538ac92d5a6625fabafc68ec97a55
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs pointing to external websites, with a high ML classifier score and ClamAV detection indicating malicious intent. The presence of external links suggests a phishing or malware distribution attempt, likely leveraging a spearphishing attachment vector. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/wix?keyword=friend+bear+care+bears PDF link annotation
    • https://cdn.sqhk.co/tutabudoxuwa/eqsifNX/laxojeligosupag.pdfIn PDF document text
    • https://cdn.sqhk.co/tirekidifole/mMheAic/swot_medical_abbreviation.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/ponakolofojow_sonifebevetor_vedixote_podurokinime.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/igiXhbZ/junior_achievement_stock_market_challenge_miami.pdfIn PDF document text
    • https://terigemi.weebly.com/uploads/1/3/1/8/131856376/lofakowudulojimete.pdfIn PDF document text
    • http://tomandbxof.site/fijojatatonavodilederuoqp2l.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/1663796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_60386ccd35696.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/dapiminidawax_mededebakimuni_sujubi.pdfIn PDF document text
    • http://kamini33.ru/6th_pay_commission_final_reporttt2n7.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/8298158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375200/normal_5fddb728a24dd.pdfIn PDF document text
    • https://loxoxonejuk.weebly.com/uploads/1/3/4/6/134684666/9907009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453901/normal_5fe5172caa441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fe01ac5aec72.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/bGF3Igh/city_runner_game.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/i3kgdii/febevinemogapusinetajedu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zafijukopa/77540785788.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/57198980248.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/devil_wears_prada_full_movie_with_english_subtitles_123movies.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 3776 bytes
SHA-256: a737df0d08d7112d008dfe5a559f54e906f395196fa6b6f9283a18f5cf43723b
font_01_sfnt_off00010f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F46 4596 bytes
SHA-256: d25198e5cda12b8281889dea826dd8565728a44f1cac187b44993ec31043cae0
font_02_sfnt_off00011ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECD 10240 bytes
SHA-256: d0b3a3c3102af0b944d4c94a49f18870049dd21b23201c940ac05a733ad7330e
font_03_sfnt_off000141eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141EB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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