Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc7ec259e66c746…

MALICIOUS

PDF

75.9 KB Created: 2021-03-21 09:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e7c8f287018c790135cd1495bc3c7bd SHA-1: 2e69837cc3a4e41e5e17b14b29db980fb3af717f SHA-256: 6bc7ec259e66c7469ee247c57f2119444a97129fc548a4f82353b36036686347
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/strik?utm_term=what+is+tanya+in+judaism
    • http://vuwefedope.sportsontheweb.net/99393077478.pdf
    • http://lalexejiwisejul.iblogger.org/vuvafalokepewezifibut.pdf
    • https://movulejovem.weebly.com/uploads/1/3/4/4/134470355/nudus.pdf
    • http://fafabil.getenjoyment.net/compress_quartz_filter.pdf
    • https://cdn.sqhk.co/mevazasid/gYzfjgt/befizob.pdf
    • https://cdn.sqhk.co/kafosine/dDjcnhd/wuzenotuzigofexogajufaze.pdf
    • https://cdn.sqhk.co/kejopala/ihagjif/bluetooth_terminal_hc-_05_windows.pdf
    • https://cdn.sqhk.co/dipujabuxiw/iajf6X4/46709518626.pdf
    • https://cdn.sqhk.co/gibebomesani/jbEiFia/81091512539.pdf
    • https://babixedijifaz.weebly.com/uploads/1/3/5/3/135385025/1493179.pdf
    • http://bajagiwovil.22web.org/antilog_table_download.pdf
    • https://cdn.sqhk.co/wituruxa/jdgckii/33349509289.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/71e3a12e-dd88-471e-bb7c-4415e9243963/best_saltwater_fishing_gear_for_the_money.pdf
    • https://uploads.strikinglycdn.com/files/2a73ea5a-cea6-4bac-ad9e-065b8deb658a/listado_de_verbos_en_ingles_en_presente_simple.pdf
    • https://uploads.strikinglycdn.com/files/f958469b-e6a4-4e4f-9b9b-e542ab7ff378/bilimewetiriwe.pdf
    • http://gefexusutem.epizy.com/dyson_v10_animal_plus_cordless_vacuum_best_price.pdf
    • http://depezure.epizy.com/absolute_value_inequalities_word_problems_worksheet_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/bf1db43f-86a4-4830-bd26-0df7643e1585/the_endless_summer_2_choices.pdf
    • http://bumurulepowele.myartsonline.com/what_do_i_need_for_a_real_id_mn.pdf
    • https://uploads.strikinglycdn.com/files/be53219a-e709-4035-999e-f4f8a0edc293/a_discovery_of_witches_season_3_episode_10.pdf
    • http://zuxekesimulir.epizy.com/92031712741.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_off0000ec94.bin
f3bcb03063382afd18849151cd3116569820e6165a51089e725eb0e4a86a06ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 5128 bytes
font_01_sfnt_off0000fdf7.bin
fba345d0c5fcabbed347c41059e01d759f9601d91eabe5ddfdb103f33f62121d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF7 10632 bytes

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