Malicious PDF — malware analysis report

Static analysis result for SHA-256 07923fbe49a772c1…

MALICIOUS

PDF

77.0 KB Created: 2021-03-21 04:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dafdc9ec2a1120c388bddc1d05666dc SHA-1: 7584f2e5ec2072fd973551480da128e2fd0a0ebc SHA-256: 07923fbe49a772c1baaf8481acfe243a54e86bd69b4c7ee87ab12224a88a3213
96 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to deliver a phishing or malware payload. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/award?keyword=silabas+tonicas+y+atonas+ejemplos+para+ni%25C3%25B1os+pdf
    • https://cdn.sqhk.co/rebamomidaw/oicjije/dozuza.pdf
    • https://cdn.sqhk.co/filemowa/WFihhcJ/90945453403.pdf
    • http://xemakaze.mywebcommunity.org/prince_swr_pipes_catalogue.pdf
    • http://fulifubajamo.mywebcommunity.org/flash_adc_converter.pdf
    • http://tupaxeguna.scienceontheweb.net/what_order_do_you_use_lumin.pdf
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5ff2c8ad3a7f7.pdf
    • https://cdn-cms.f-static.net/uploads/4462980/normal_6041811767d0d.pdf
    • https://cdn-cms.f-static.net/uploads/4405208/normal_603930743c8c4.pdf
    • http://zisezamerares.mygamesonline.org/25064287361.pdf
    • https://static.s123-cdn-static.com/uploads/4448556/normal_5fdfa4ea1102b.pdf
    • http://tevaruv.sportsontheweb.net/97081389382.pdf
    • https://cdn-cms.f-static.net/uploads/4373782/normal_6042f3f14a04c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/72042922-9e86-4805-89aa-72ccec1b30cf/jowiputapena.pdf
    • http://ziwivazud.onlinewebshop.net/loxujukinidonajoxet.pdf
    • http://lonesopuw.onlinewebshop.net/biginaxewonuz.pdf
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_ed0c2bceecfa45f78d84d7ebc9969f0f.pdf?index=true
    • http://jirabasojexosud.atwebpages.com/wajuno.pdf
    • http://zubiluwetij.myartsonline.com/what_is_compacting.pdf
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_f0faae07a03545c2adb09e1d00dae46e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e2531989-407b-4b57-8d0d-a166dbf226af/is_craftsman_still_lifetime_warranty.pdf
    • https://uploads.strikinglycdn.com/files/b119fb62-53ce-4a4f-8b73-edff0674403e/sony_wi-1000xm2_vs_wh-1000xm3.pdf
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_3439ac5ae2e644a98534f2456791c7c9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0ba54f65-1f59-42a0-a8c8-7467779c6b53/dapafidubog.pdf
    • https://uploads.strikinglycdn.com/files/ef4577e8-e3e4-4b77-a00d-1b3ee6a581e2/45475392255.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_off0000ea95.bin
9865cd1090e5478d3bf77a3a93a445e9c382f13604c46cf2ce2c0f0cd5e7a8bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 5932 bytes
font_01_sfnt_off0000fe75.bin
672fc30424c28bde46072fa154520f43deb4171a48ed509b49332544eca21799		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 11560 bytes

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