Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34782828062bf8e…

MALICIOUS

PDF

67.6 KB Created: 2021-03-20 18:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1de8cfbf602fc5bccc8b370fb423381b SHA-1: d754fd13c3a460983ca28fc60eb6749a4a509b15 SHA-256: a34782828062bf8eab1a3aa1c13c37713db464e95efdd8d99d09794f9a10043e
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 URL that redirects to a website, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests an attempt to disguise the malicious link as legitimate educational content. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=practice+temperature+conversion+worksheet+8th+grade+physical+science
    • https://cdn-cms.f-static.net/uploads/4472186/normal_6025be43c38ca.pdf
    • http://niwizonoleror.mywebcommunity.org/povamo.pdf
    • https://static.s123-cdn-static.com/uploads/4373997/normal_5fe142ade7b0a.pdf
    • http://juponuziwotaga.mywebcommunity.org/47433769623.pdf
    • http://kudikadip.getenjoyment.net/22032188202.pdf
    • http://timecodes.net/2012_kia_sedona_user_manualso3ye.pdf
    • https://cdn.sqhk.co/kiraxozi/Gevjc4C/6902874978.pdf
    • http://ruxuzosok.mywebcommunity.org/ritum.pdf
    • http://idslim-italia.site/348592939507jqn8.pdf
    • https://cdn-cms.f-static.net/uploads/4465938/normal_6019bb3324170.pdf
    • https://cdn.sqhk.co/kuvuwisarov/hhEqHoY/40351038038.pdf
    • https://cdn.sqhk.co/vumojakizaw/g87PhL3/pabepemesite.pdf
    • http://meetplafond.xyz/18442680100079vt.pdf
    • https://cdn.sqhk.co/jowepotoxum/ghcicic/herpes_simplex_2_test_results_5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jowawaba.atwebpages.com/xedukufisuwapo.pdf
    • https://uploads.strikinglycdn.com/files/172c204a-967f-4b4b-b763-f7f97f7271c5/31063240235.pdf
    • https://uploads.strikinglycdn.com/files/5685eb4f-36a0-4d3d-8ea4-0ee4a727bca2/tovilakewozefibozajavamub.pdf
    • https://uploads.strikinglycdn.com/files/7a9eea2b-7b35-42fa-8510-dfba9e415ef4/redananidiwik.pdf
    • https://uploads.strikinglycdn.com/files/9ac55e32-aa0c-4751-8a66-d21ec1b12e57/tewim.pdf
    • http://makakanow.onlinewebshop.net/dbx_driverack_pa2_price_philippines.pdf
    • https://uploads.strikinglycdn.com/files/14ee5b72-1bca-44a5-8e79-700ab1b3135a/the_black_prince_full_movie_in_punjabi_hd_download.pdf
    • http://xenezipulugiji.atwebpages.com/agenda_2020_y_los_ods.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_off0000c8e1.bin
d49f844ff843d9cf1556e0a4641d259c0fb86a1eb74b1428af0b1952b8de20af
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E1 6000 bytes
font_01_sfnt_off0000dd3d.bin
42f6145486866f852f41ed53cff073bdac2bee3706e322b65eef29538dc52987
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3D 10256 bytes