Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb48622b7211c5ee…

MALICIOUS

PDF

75.6 KB Created: 2021-01-27 10:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 163e28ecbf64c2ded78a1c7bd89483f0 SHA-1: 1c40fe2f8ac2a8c26a2c5f4d713dbde03809c1b9 SHA-256: cb48622b7211c5ee98fc3988e8ab226a873254fb4eacddf5067ada7215e5cd1b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The embedded URL and document body suggest a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to redirect users to malicious sites or download further payloads.

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://druttle.ru/123?utm_term=nudos+y+amarres+basicos PDF link annotation
    • https://cdn.sqhk.co/gorokipo/ukCjhHU/83580592878.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/cher0Tf/pokemon_masters_ex_mod_apk_2._0._5.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/ijjbDjh/lost_in_harmony_ios_review.pdfIn PDF document text
    • http://glasshookahcatering.com/doctor_career_paths_ukn25c6.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/hchdGja/tutufugo.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/cjjggKh/91573776967.pdfIn PDF document text
    • https://cdn.sqhk.co/sewenajete/dMKjOBS/64953025525.pdfIn PDF document text
    • http://groshyk.site/automower_connect_app_store3ukra.pdfIn PDF document text
    • https://cdn.sqhk.co/lerutefo/eAghjaO/rozegekizidiguxilog.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvevevef/jdjeOhd/dj_loop_pads_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/ihhjhcT/troll_face_quest_video_games_2_level_30.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumigetutiburu.epizy.com/50066303204.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/canson_a3_polypropylene_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/ags_pre_algebra_teacher_s_edition.pdfIn PDF document text
    • http://tosaxope.rf.gd/pdf_file_reducer_soda.pdfIn PDF document text
    • http://vakutasuv.epizy.com/set_alarm_clock_in_android.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 5264 bytes
SHA-256: e2f505e401b2b7f2da041f443386b9b704a7ae4b5897048b38e01eb28f5fc688
font_01_sfnt_off0000fb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7B 11204 bytes
SHA-256: aa08dc44e0cba26cc7b51b22d36f68826901aae754782a063e8d407b076d7385