Malicious PDF — malware analysis report

Static analysis result for SHA-256 75006627f23c6f66…

MALICIOUS

PDF

78.2 KB Created: 2021-03-16 13:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 833b23e376f6fbccb2f4d51a0706fd1a SHA-1: 59553a768e0afbb36dc15b59cef95c5df2fbb24d SHA-256: 75006627f23c6f66a9218f7545126a84442e6216005a9a8e2dc4768b11ad302e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing or malware payload. The document body, though heavily obfuscated, suggests a lure related to educational materials, specifically a 'balancing equations worksheet answer key'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=balancing+equations+worksheet+answer+key+1-37 PDF link annotation
    • https://cdn.sqhk.co/tivinarafuvu/gR3gjgh/90081439591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494888/normal_602ab6880741c.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/gMAiPjh/tedudib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389101/normal_5ffaa6377b58b.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/english_grammar_with_tamil_explanation.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/mjehjOf/casino_cash_claw_machine_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/jjkM3he/hard_boiled_eggs_in_farberware_pressure_cooker.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/GugdhiU/23180672492.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/hdPhchd/21132597390.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6663439-6871-4e5f-99b6-e76ca0e0ca08/sibala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9c7d9b-ab8f-45f1-b041-deaa419944c1/56818205680.pdfIn PDF document text
    • http://femagela.myartsonline.com/dewepinudozapizubakesegak.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/jasperreports_maven_dependency_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe873055-1730-4171-af95-f61029dba7ae/lorevejevatubapibud.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/piwawuxudutasorurufukiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd262d5f-4d39-4f95-b353-006557e8610d/35199809572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879af19e-2a85-4986-a713-1b7d256f55e1/stop_strategy_for_writing.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EF 5820 bytes
SHA-256: 4b81e4f85e3282ac883fa36ec1e3a17bd3c49d89418482e135151b503cefcacf
font_01_sfnt_off000104e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E7 11516 bytes
SHA-256: 54c180d462ad744fe172b466ef5ec6010749aaa3277d6bc02044e723dfe59eef

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