Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40ae13b071d2260…

MALICIOUS

PDF

79.6 KB Created: 2021-03-09 05:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf7fb0eb7c38e919b9f27e548090ece3 SHA-1: d8c9b162d53aac4b9a51d3b5cfe0e4b29caaffad SHA-256: b40ae13b071d2260b1692a5bbc1377bda07f95e8bcb8fcef145ca7c64bc4e1b6
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to a suspicious domain, suggesting it's part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://nipisod.ru/award?keyword=aumund+bucket+elevator+pdf
    • http://hargotel.xyz/1966185356z4rga.pdf
    • http://shtangennstutkupitseychas.xyz/saribewezodumonorf.pdf
    • http://famozosivupiwij.sportsontheweb.net/12_cuentos_peregrinos_resumen_de_cada_uno.pdf
    • http://tafugegajotu.mygamesonline.org/sugujaxanepilisina.pdf
    • http://passive-income.ru/gonisibapexifnmp7.pdf
    • https://fufarolobol.weebly.com/uploads/1/3/4/5/134597676/xefikus_zulog.pdf
    • http://narovomesizi.medianewsonline.com/80477023661.pdf
    • http://nidomamedop.22web.org/valley_app_apk.pdf
    • https://bumudipokipilu.weebly.com/uploads/1/3/4/3/134350227/5fd180e.pdf
    • http://viniveba.mywebcommunity.org/ninupoxowoduru.pdf
    • http://mawosatejojeka.sportsontheweb.net/tarot_card_love_reading_in_hindi.pdf
    • http://jedilinosur.mywebcommunity.org/sapidetowabunenevija.pdf
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/3307675.pdf
    • https://zapeledi.weebly.com/uploads/1/3/5/3/135314532/599e3c7.pdf
    • https://pakajifovajopif.weebly.com/uploads/1/3/1/6/131607230/111d69d3.pdf
    • http://lazujifoxupa.getenjoyment.net/can_you_record_a_deed_online.pdf
    • http://wamipivifubape.sportsontheweb.net/kijifazeruxag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xovimed.rf.gd/rosevojeforefesilom.pdf
    • https://uploads.strikinglycdn.com/files/127f8c7c-e431-4b3a-a58c-dc10b328721b/how_to_save_config_cisco_asa.pdf
    • http://xekabotiwuker.atwebpages.com/69977689385.pdf
    • http://sedurawuzomutam.epizy.com/5215542961.pdf
    • https://uploads.strikinglycdn.com/files/a1d9b5db-e0fc-4efa-b026-dc82ed60320d/ap_calculus_ab_practice_exam_2018_answers.pdf
    • https://uploads.strikinglycdn.com/files/2f1ed294-4da3-47d9-b68a-9f6ea446b41a/biscuit_hammer_mangadex.pdf
    • https://uploads.strikinglycdn.com/files/1d0dd25c-2321-498b-985b-06c51ef640e7/19443405022.pdf
    • http://supabije.rf.gd/health_canada_gmp_inspection_reports.pdf
    • http://bavevex.onlinewebshop.net/most_common_idioms.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f906.bin
956e9716d1b48440e443c75ca1d0b6ae43ca8761f8112134a73cef10c9a3e043		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF906 5376 bytes
font_01_sfnt_off00010b42.bin
37008aea24e26bd402017369e071bdea161bb3dc140969fa61716bd43045f862		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B42 10424 bytes

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