Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7d555621f22ef8…

MALICIOUS

PDF

76.1 KB Created: 2021-05-23 09:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b88cd3056a1c0eda9ab9e70e2c1e5961 SHA-1: 7228b73939f83d4cef8e697030aaf03ad9ee0cfb SHA-256: cb7d555621f22ef884294c5bdd62caf5dbff4d8e2a1594916b6feba5c09212ea
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=que+significa+sentido+de+comunidad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369905/normal_605a1d954a6b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5ff1d83e5a04a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413570/normal_6005f079b7f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482648/normal_606ac6cd891ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462678/normal_5ff0f6ed960c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_5fd36a26e2bc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_600f2e148abc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370547/normal_5ff80a7c719ef.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/pazerogasarinu/39470333157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cbf5486-bdf3-48e8-aacc-ca1b04bca359/toro_personal_pace_30_inch_mower_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85b0f9a-2d34-4780-b049-ea5d1cb0d828/how_to_prepare_before_wisdom_teeth_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc288a6-7614-4519-abaf-7d74e66a6dc4/xugedivafajotona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21334f6b-e6f3-4b19-aaee-1c5b15d7bef3/how_to_use_lg_inverter_direct_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8df2813-f2b8-44b0-89d3-97c9e4c2fca5/uppababy_vista_bassinet_car_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ca2f48-233d-4616-b34c-93058c7fc06f/fudil.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/army_song_wapking.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/bhavesh_joshi_superhero_movie_songs_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/40850783948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d85cd787-8153-44ed-b77f-0df7b766e42e/craftsman_electric_mower_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706355dc-4215-4439-8f56-f176c682e9db/english_short_stories_for_grade_3.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_off0000eaf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF6 5272 bytes
SHA-256: 911e77cb07ee5dab70d216c94b3f3e330978673ecba7dff799093dd0254e0165
font_01_sfnt_off0000fce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE0 11124 bytes
SHA-256: ee609611156b1b7411cafebc9cbe6e2f481a53a2d0641ab01ac089dd2cdf52d4

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