Malicious PDF — malware analysis report

Static analysis result for SHA-256 5861374bc5edbcbd…

MALICIOUS

PDF

77.4 KB Created: 2021-02-27 14:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff004ba6803807210ef9adbcf3619e13 SHA-1: fca9ee67809bf57d29225cc3d1362987e4cbcb9f SHA-256: 5861374bc5edbcbdfbf2f868c1d351849207b57b2ed0673538426ecefc5b657f
96 Risk Score

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. The presence of embedded URLs, specifically 'https://dugedepap.ru/123?utm_term=how+to+use+doctor+brown+bottle+warmer', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, aligning with spearphishing attachment tactics.

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://dugedepap.ru/123?utm_term=how+to+use+doctor+brown+bottle+warmer
    • https://kujoposa.weebly.com/uploads/1/3/1/4/131453526/4259541.pdf
    • https://cdn.sqhk.co/tononapiwaso/eoggLhO/othello_sparknotes_translation.pdf
    • http://fashion-deals.xyz/action_verb_list16tob.pdf
    • https://cdn.sqhk.co/wepunajexiju/n1Jicig/project_plan_free_template.pdf
    • http://rubka.space/admin_clerk_duties_and_responsibilitiesh9vsw.pdf
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/2263728.pdf
    • https://sawotulexude.weebly.com/uploads/1/3/5/2/135298589/4644860a4084692.pdf
    • https://cdn.sqhk.co/gunobawiwax/oQkghjj/monster_battle_codes_2020_june.pdf
    • http://wijasagasipode.getenjoyment.net/emperor_jones_summary_and_analysis.pdf
    • http://hurleyshamburgers.com/gomifizadfrb1b.pdf
    • http://zeboxagekej.sportsontheweb.net/how_do_i_use_my_instant_pot_duo_evo_plus.pdf
    • https://midusafamiriron.weebly.com/uploads/1/3/4/7/134702540/6802884.pdf
    • http://xexapitanegis.getenjoyment.net/5947194280.pdf
    • https://bomaripuxizidul.weebly.com/uploads/1/3/4/9/134901287/97403.pdf
    • https://cdn.sqhk.co/tamejenonisi/if9p7gg/telov.pdf
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/6506225.pdf
    • http://uuuuull.space/fr_leavis_the_great_traditionzaypl.pdf
    • http://labifovejes.mypressonline.com/89094221990.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rawesaragegugar/36315521187.pdf
    • https://s3.amazonaws.com/tonemakopinibem/la_venganza_del_conde_de_montecristo_pelicula_completa_espaol_2002.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_off0000edca.bin
95eec9ed9cef18fa0a7aa17fabb46187f9865b303dc290c4dd4ce76d1bbfdbf9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCA 5276 bytes
font_01_sfnt_off0000ffb1.bin
d9ceef604c668674ca6a34b392da795e22e37a4ab72dcd990198a5ad4af4dc49
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB1 11488 bytes