Malicious PDF — malware analysis report

Static analysis result for SHA-256 70103fba1291ce38…

MALICIOUS

PDF

76.4 KB Created: 2021-03-25 21:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 036b8f252bffdf9c4068e2c6aa3872c4 SHA-1: 6e38ef10f65e2f438d08201334baae8df38c0a80 SHA-256: 70103fba1291ce3800ac8fb7d464f7325575cb70b15a82ca57355b2b49d28d03
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'seumenha.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'practice test'. No scripts were extracted, but the PDF structure and embedded URLs indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/wix?keyword=fbla+sports+and+entertainment+management+practice+test
    • http://everydayy.fun/lugevaredodikubomipajuvilq17rh.pdf
    • http://tidedejix.iblogger.org/torerusotafifesemafom.pdf
    • http://lomirefuw.iblogger.org/premiere_pro_14.0.1_download_mac.pdf
    • http://fitokaps.xyz/what_to_do_if_ink_cartridge_cannot_be_recognized_hp6ihck.pdf
    • http://parujom.iblogger.org/21084757982.pdf
    • http://constructionhouse.info/nexubobatepw5buu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/eadb7c68-cb61-4b29-929c-285e1a62e7ad/breadman_bread_machine_manual.pdf
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_89e0add80f9840bf8cd9deca15a46ae3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/14263892-6a5d-43e8-b656-00f12ff2e9f0/83361416510.pdf
    • http://nekelaxowe.atwebpages.com/manuale_di_comunicazione_assertiva.pdf
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_b22a422278b740b6a395ceb5b0ce52e1.pdf?index=true
    • http://setenitavugim.rf.gd/ramobezawebolaxevax.pdf
    • https://uploads.strikinglycdn.com/files/468c01af-cd32-49fb-8b6b-d11988429d78/gefujavir.pdf
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_bc5fe3fa01f34a35817a6c34467ecce2.pdf?index=true
    • http://bozalusi.epizy.com/vuzunujus.pdf
    • http://diwavubodinaroj.myartsonline.com/fofemagila.pdf
    • http://wusanobe.rf.gd/62991827383.pdf
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_e0e3e935377a46a8abfcd6b4b43745be.pdf?index=true
    • http://xidozine.rf.gd/embed_image_in_google_sheets.pdf
    • http://divigamokumisi.rf.gd/63282092968.pdf
    • http://ketagarewetene.epizy.com/mathematics_textbook_for_class_8.pdf
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_5dd7737b7efd4534a4af224b993e6b3f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/899fd594-4097-4e77-8458-011e68d9f0fe/calories_in_taco_bell_cheese_sauce.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_off0000ed31.bin
ac841774e993c4b9ea3bfd1ea29234c4d83955293f4eefa8b69f538038cbe74e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 5488 bytes
font_01_sfnt_off0000ffc2.bin
80eb276c5bdaa4eaa97bbef6035cbbbf64163fe61fbde6cd7b7c90ba43564176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 10400 bytes

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