Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa93e6a86d049db6…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 10:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a97907d7d0b30b48c73872fb239b2cf SHA-1: d0de93013fd1d5316e6c23f944c262ed1857bff7 SHA-256: aa93e6a86d049db6d68d0d855a99209619abf4db235da48796bf51a5cdc9b397
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file. While no scripts were explicitly extracted, the presence of an external URI suggests the document is designed to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=a+series+of+unfortunate+events+cast+season+3
    • http://9gusevshop.website/orlando_nursing_process_theoryfpdbt.pdf
    • http://ingmijn.com/formas_bidimensionales_ejemplosaqll0.pdf
    • http://leraxedosu.22web.org/business_strategy_frameworks.pdf
    • http://avit0.pro/no_crop_pic_for_instagram_apk_downloado9z5c.pdf
    • https://cdn.sqhk.co/ditetona/iMdjhhf/refegexuwemubaxekina.pdf
    • https://cdn-cms.f-static.net/uploads/4422163/normal_6032e3fdc17be.pdf
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5ff045739da8e.pdf
    • http://liketime.fun/metu_neter_vol_1_7_free_downloadw0hsd.pdf
    • https://cdn.sqhk.co/gikunixa/TvslqI0/wizimasimujezibuba.pdf
    • http://marketitaly.pro/how_to_count_numbers_in_google_sheetso2cgl.pdf
    • https://cdn.sqhk.co/gitovera/zBrnLhj/collect_cubes_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/ropidadegaxut/why_wont_command_prompt_open.pdf
    • https://s3.amazonaws.com/jiguwuzobozobaz/kalegu.pdf
    • http://zuxekesimulir.epizy.com/52529394783.pdf
    • https://s3.amazonaws.com/fobupojowojon/memelup.pdf
    • http://jusowegakero.epizy.com/account_google_manager_apk.pdf
    • http://gatopaxabijux.epizy.com/87919538042.pdf
    • https://s3.amazonaws.com/bulalowisu/goodbye_lullaby_avril_lavigne_album_free.pdf
    • https://s3.amazonaws.com/tazibabebamep/presidential_system_vs_parliamentary_system.pdf
    • https://s3.amazonaws.com/sojaxub/kartonyono_medot_janji_cover_aviwkila.pdf
    • https://s3.amazonaws.com/paropabaru/bootstrap_3_form_validation_regex.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_off0000efe6.bin
19f39edfde60eb65d0a6f2bd4723e266cf4b4c348193082e0684e0c99a972467		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE6 4940 bytes
font_01_sfnt_off000100c2.bin
2251a1cbd4b2f392858cbd413b544a34251969b98731a276949039112b092fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100C2 10528 bytes
font_02_sfnt_off000124b8.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124B8 4324 bytes

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