Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ae6d1d56d9728a…

MALICIOUS

PDF

76.9 KB Created: 2021-03-03 10:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45035768b23cb2c1393ff38db7aa1499 SHA-1: 27244e9e50b3991ef4d54f4ecdd5b9447480b589 SHA-256: 36ae6d1d56d9728ae081e42581997127b2b5617d0fbe7059d95a91be475fe0b1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to a resource that appears to be a lure for downloading an ebook, suggesting a phishing or social engineering attack. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest the PDF is designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/123?utm_term=biochemistry+satyanarayana+ebook+free+download+pdf
    • http://azules.ru/watch_the_passion_of_christ_in_englishoguoh.pdf
    • http://good-production9.site/what_is_tcp_and_ip_protocol_in_hindi4pbs7.pdf
    • https://cdn.sqhk.co/fuvepiwedo/jbEhjAo/magic_twist_twister_music_ball_game.pdf
    • https://cdn.sqhk.co/vedanoderifu/jjbJ8je/7ft_frosted_pencil_christmas_tree.pdf
    • https://cdn.sqhk.co/xumefotebe/OoNpig1/ziluvogawekisij.pdf
    • https://cdn.sqhk.co/tirabipati/dibihjc/christmas_delivery_slots_asda_2019.pdf
    • http://jebewif.22web.org/advertisement_design_guidelines.pdf
    • http://dozixolabizije.iblogger.org/e_tv_guide_yesterday.pdf
    • https://cdn.sqhk.co/miwurazaz/amicAjj/lavugi.pdf
    • http://kawolamekepe.22web.org/what_does_power_structure_mean_in_literature.pdf
    • http://lakulikelanu.iblogger.org/sims_4_parenthood_mac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://deriwabip.epizy.com/91509650417.pdf
    • http://losisotudek.epizy.com/cosmoteer_ship_building_guide.pdf
    • http://ragomoxos.rf.gd/lagu_chrisye_pelangi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07e.bin
4714dd0f6987c32dd3de58f1d02cfde621bbc7532586512348df37556dbae607
pdf-font-stream PDF embedded font (sfnt) at offset 0xE07E 5632 bytes
font_01_sfnt_off0000f38b.bin
106629676cee27e906d85276ec6ea7010e3f8508420488b46549bfec311d3bd0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF38B 10812 bytes
font_02_sfnt_off00011879.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x11879 4324 bytes