Malicious PDF — malware analysis report

Static analysis result for SHA-256 b506f1c64fb5645f…

MALICIOUS

PDF

94.9 KB Created: 2021-03-01 05:58:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 96e07540581331f1d6fb7f0c3ad4b95e SHA-1: 77967e53f30d9acbdaeccda0544fca4f888ee590 SHA-256: b506f1c64fb5645fd89bf0e073497cd639ffa7ae1e1cedb40b627098f5b3b174
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wb?keyword=shoei%20neotec%202%20sena%2030k PDF link annotation
    • https://cdn.sqhk.co/jeforije/jahbiel/bad_piggies_level_2-_iii.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/how_long_does_graco_snugride_35_last.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuzadisup/hihaNBN/zarevosanigodigeven.pdfIn PDF document text
    • http://speak4pro.com/apprendre_vocabulaire_espagnolw7qzj.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/ecuaciones_de_segundo_grado_ejemplos_con_grafica.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/where_is_the_most_human_trafficking_in_the_us.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/ihiiwSZ/vawekobofenuvusavipuk.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/lost_tribe_of_the_sith_sentinel.pdfIn PDF document text
    • http://leledup.mypressonline.com/85057911335.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/fuganakurejuketud.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/pubopelej/ponakokume.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/72672001268.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/empire_shopify_theme.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/2017_chrysler_pacifica_hybrid_user_manual.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/how_do_you_do_zero_waste.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/makalah_tentang_bahaya_narkoba.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_off00012524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12524 4272 bytes
SHA-256: dbefbb33be411edc61677244c53403d3b855c010fb6810a5af4b519dd745565a
font_01_sfnt_off0001341c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341C 5364 bytes
SHA-256: d76e053f9f07bea13884587d6968253c1b7ee3af37771d646d3318d77165cb41
font_02_sfnt_off00014659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14659 11892 bytes
SHA-256: f516628363ed379cce7e9c81f8ac793e08239e8a9ed93ebb38ec907f2deba551

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