Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8f42a8da8b8f67…

MALICIOUS

PDF

73.2 KB Created: 2021-02-25 18:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73ba5729fc68ac53d02b9a66ffc98724 SHA-1: ed110d8fe5961d5f719a0c49ca34af9feb40dffc SHA-256: ae8f42a8da8b8f67f9e35e95a83ea1d7a300ef6cdeed89b877998f0f1f72aa34
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or phishing content. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, aligning with common phishing tactics.

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://jottigo.ru/wix?keyword=multiplying+rational+expressions+worksheet+algebra+2
    • http://vvd.bar/184730372381jfwi.pdf
    • http://nejevefivi.mypressonline.com/vobaka.pdf
    • https://cdn.sqhk.co/lupobikud/haru4ak/988617364.pdf
    • https://cdn.sqhk.co/malevevipali/ejfThgN/orange_and_black_balloon_garland.pdf
    • https://cdn.sqhk.co/wivenute/jzOKGjj/box_office_tycoon_hack_apk_1._0.pdf
    • https://cdn.sqhk.co/desiruzag/hijeATn/bomuduborereletuvutij.pdf
    • https://cdn.sqhk.co/kumotuxijufu/1hfifiA/biocultural_evolution_definition_anthropology.pdf
    • http://lamaded.mywebcommunity.org/tixajutedogazevupuzenen.pdf
    • https://cdn.sqhk.co/ranetixeba/cCticPk/kingdom_builder_board_game_rules.pdf
    • http://rezotu.xyz/237862559820zw7.pdf
    • https://cdn.sqhk.co/tunuviju/dgghgQK/ultimate_fall_guys_mod_apk.pdf
    • http://bagomebefekixob.getenjoyment.net/mumorosetugirofet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fowikorejodi/savijisebenibibakagutujid.pdf
    • https://s3.amazonaws.com/bopuxosavubare/58841501037.pdf
    • https://s3.amazonaws.com/viwoxuz/1330711041.pdf
    • https://s3.amazonaws.com/gorajikunobixi/fodogabijitakoputuserixa.pdf
    • http://jasunusemoki.onlinewebshop.net/html_css_templates_free_download_responsive.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_off0000e136.bin
575094b7093fe201b64b479554377a47520f8b18b45f58ba3269a625d37d55a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE136 5684 bytes
font_01_sfnt_off0000f4af.bin
72631db7eef9ac8d39b62140e54cfad12c83e8574b31c383c69c2e63f418ed85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AF 9996 bytes

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