Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a5ef1e3eb7eadf…

MALICIOUS

PDF

80.4 KB Created: 2021-03-15 19:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7c40119497b11238131e985e7e43e8c5 SHA-1: 4fff975aeb451902d1ea46b02b66d7a4dd69962f SHA-256: c3a5ef1e3eb7eadfca9363b20cf4b5bdb8adeac05374e9bfa727f68883bd241a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a tutorial for watercolour pencils, likely to trick users into visiting a malicious site. ClamAV and ML classifiers strongly indicate malicious intent, specifically phishing. The presence of multiple unknown URLs suggests a phishing campaign aiming to deliver further malicious content or collect user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/aws?utm_term=how+to+use+watercolour+pencils+for+beginners PDF link annotation
    • http://devlp.design/981833693911p75m.pdfIn PDF document text
    • http://xujukega.66ghz.com/70570314848.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/210693119.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/tidulorobis.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/tudox.pdfIn PDF document text
    • http://tublitalia.fun/pifepufaxomu0n34e.pdfIn PDF document text
    • http://pifumufupes.iblogger.org/air_force_1_pixel_summit_white_gold_chain.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/98185493463.pdfIn PDF document text
    • http://olx-delivery.cc/ejercicios_de_fracciones_equivalentes_para_cuarto_gradobtr07.pdfIn PDF document text
    • http://tujozavido.66ghz.com/bollywood_movie_2019_sites.pdfIn PDF document text
    • http://loziwazekon.medianewsonline.com/ferunozuxiwitedo.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/9057686573.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/suxuzubojut/44940753484.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/28417843100.pdfIn PDF document text
    • http://positajugopisu.myartsonline.com/manupuwatowepami.pdfIn PDF document text
    • http://jarepumemaxi.onlinewebshop.net/tivulomusovavifono.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/harassment_act_2017_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/ich_gcp_guidelines_investigator_s_brochure.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/star_chart_tonight_jupiter.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/sikokifenetimipe.pdfIn PDF document text
    • http://jaminuzifibe.onlinewebshop.net/aristoteles_y_dante_descubren_el_universo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 5256 bytes
SHA-256: a44fa2796843affb13e15e22cd01b1ced0d5b4bbb5e85249dac00a63c26b32bb
font_01_sfnt_off000102f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 10208 bytes
SHA-256: 63def1e678bf95244e5b12c30514fe8676c2f036d0b143feef1d56565cdf49ba
font_02_sfnt_off000125b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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