Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca34469fd345ffef…

MALICIOUS

PDF

84.1 KB Created: 2021-03-22 00:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5fbc2447f6570235970a749fb652ffae SHA-1: a1732dc3a5715fcfd331c969996ca746edb89e60 SHA-256: ca34469fd345ffefa3ef38bd1639f9d0b64fcee377bbb6b31652d0a237b311d0
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. The document body, though heavily obfuscated, suggests a lure related to educational content, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/award?keyword=polar+and+nonpolar+molecules+worksheet+pdf PDF link annotation
    • http://fesotisifofil.mygamesonline.org/aswb_practice_exam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_603ecea4b53e4.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/22004753690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404730/normal_60370de3272ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446789/normal_5fe395d7b8880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_60446196b73c7.pdfIn PDF document text
    • http://gotesesevuzi.iblogger.org/fikajivadewalomesule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402717/normal_5ff775d68e82d.pdfIn PDF document text
    • http://jezonikiroka.mygamesonline.org/manimudogosope.pdfIn PDF document text
    • http://supozupewurak.22web.org/pneumatic_tmt_rod_bending_machine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xomapagovujux.atwebpages.com/mamisutemukuronosifuxob.pdfIn PDF document text
    • http://bajekixizosi.myartsonline.com/asistencia_tecnica_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/66507581228.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/biluredujone.pdfIn PDF document text
    • http://xuletesowugi.epizy.com/xubokazevep.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/la_crosse_technology_alarm_clock_review.pdfIn PDF document text
    • http://gutuxujerulobed.epizy.com/verbal_reasoning_questions_for_class_3.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/buvovilorijenuk.pdfIn PDF document text
    • http://kugunimekuxaf.epizy.com/voice_recorder_for_jio_phone.pdfIn PDF document text
    • http://zivuneko.epizy.com/adobe_photoshop_app_for_windows_10.pdfIn PDF document text
    • http://nanesipub.rf.gd/bovisomepe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 5388 bytes
SHA-256: 9210f669e174e7ee692d4b0a77511d5d58f8564bbd5db20ad147238ac3dd7894
font_01_sfnt_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 10844 bytes
SHA-256: 2b3c72944b9f2983b810c6a35f5ed78aa19bf9330cec7a78e3d79caaa21fac2f
font_02_sfnt_off00011f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4A 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140
font_03_sfnt_off00013410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13410 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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