Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97d1ecd71b69d37…

MALICIOUS

PDF

78.8 KB Created: 2021-03-09 10:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8903c500fb461d55bb03765b3abc4a04 SHA-1: 2eec690a412a4ec09b4caa40f7c93874719b0016 SHA-256: f97d1ecd71b69d371a40f7b695d1879fe634f9b868d3cebd0d6f5fff54c7e340
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'https://nipisod.ru/123?utm_term=alphabet+printing+practice+sheets', which is likely a phishing or malware distribution lure. Although the document body is heavily obfuscated, the presence of external URIs and the overall detection suggest a malicious intent to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/123?utm_term=alphabet+printing+practice+sheets
    • http://mevukavotidu.getenjoyment.net/first_aid_usmle_step_1_2019_download_free.pdf
    • http://onenature.space/7714546515573qif.pdf
    • http://mevukavotidu.getenjoyment.net/geruwujewefebiju.pdf
    • http://idealslimitalia-official.site/dolibomooliwo.pdf
    • http://arthromedshop.xyz/lenovo_g50-45_laptop_motherboard_pricejow2n.pdf
    • http://ipoteka.net/active_listening_skills_for_teachersphmmy.pdf
    • http://fuvunopulo.22web.org/video_er_facebook_android_apk.pdf
    • http://retys.fun/21946711081q9jf9.pdf
    • http://xepuxupipe.mywebcommunity.org/halo_wars_2_free_download_for_pc.pdf
    • http://reetodo.online/vuxomanozifuzepumonerevftfdj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/939d525f-5848-42ca-bc8d-9b7d3402aadf/gutezudedijulu.pdf
    • https://uploads.strikinglycdn.com/files/75355ebf-ff8e-4bac-b0b8-c0545db365c3/social_contract_examples_in_the_declaration_of_independence.pdf
    • http://lesupaj.epizy.com/elkay_drinking_fountain_water_filters.pdf
    • http://vujuvisesakok.myartsonline.com/guitar_grimoire_exercise_book.pdf
    • http://pogetowem.onlinewebshop.net/13118057738.pdf
    • http://matoros.epizy.com/game_maker_studio_2_tutorial_espaol.pdf
    • http://rupilozomu.epizy.com/speed_queen_error_code_ed23.pdf
    • https://uploads.strikinglycdn.com/files/168c1367-7b3d-4ed6-855b-2175085d2d56/dewalt_dwx723_heavy_duty_miter_saw_stand_parts.pdf
    • https://uploads.strikinglycdn.com/files/d10246c9-a552-4dee-87b1-e6f8cc362a90/hermosas_criaturas_2_pelicula_completa_en_espaol_latino.pdf
    • http://rususekobijo.myartsonline.com/gemotetililotopogokon.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_off0000f6c0.bin
ca5978766bbf4091edef6c25d30744749582720878e51e24ee913a34c48a3581
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 5324 bytes
font_01_sfnt_off000108ce.bin
60a27fd1d277ae1374dae599b1d7f2f0e65a1f03384c842591126de57a77a2c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x108CE 11020 bytes