Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bbf7641f233e0a…

MALICIOUS

PDF

96.6 KB Created: 2021-02-05 14:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 19506e3627033364b82882e141d661e2 SHA-1: 2004ce079fbb999313fdbe61c731f689cd77c1a7 SHA-256: 74bbf7641f233e0a54e99ae3ce4dc0f08ab3e549c35b1ad63e3c35272b5ea5de
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded external URI pointing to 'druttle.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

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://druttle.ru/123?utm_term=plant+pigments+and+photosynthesis+lab+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378856/normal_60027c2c6bf44.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/rgcjhgd/xoruwezupikepemegored.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/ggZkzgh/domino_pizza_delivery_driver_salary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491169/normal_60029fca1e259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405179/normal_5ffff691323cc.pdfIn PDF document text
    • http://tronreserve.online/plant_pararetrovirus_rice_tungro_bacilliform_virusf9e07.pdfIn PDF document text
    • http://zesamoa.online/46799404188yk4xu.pdfIn PDF document text
    • http://natorg.fun/maxwell_s_equations_in_word_formb04v0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382614/normal_5fde316f3c942.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/gKjjszT/fallout_shelter_cheats_app_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zidenigad/77524440825.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/agenda_template_for_event.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/http_game_guardian._net.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/blockman_go_dark_alpha.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/catalogo_ikea_2015_scarica.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/tususe.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/live_wallpaper_for_android_oreo.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_off00013a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9A 5600 bytes
SHA-256: 84b90ab96cf23544f2e19b357f5b01c1d6c8497e313067b1751424b657f09e6c
font_01_sfnt_off00014d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D87 11656 bytes
SHA-256: cce1b885412dab83513251125972ad9165a099f2ba29f91caa54b89eb76f37a3

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