Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a9dd7944a4d28e…

MALICIOUS

PDF

80.4 KB Created: 2021-02-16 05:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: da00970f620c24954a3779ab761fc4f7 SHA-1: 4241aa25306fc0053b48551b38539aef1d2cf4c1 SHA-256: c5a9dd7944a4d28ed3ac9bc017f628380bf3c9fd044e0fcfe43b7c17c424690b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious content or phishing sites. The document body, though heavily obfuscated, contains keywords related to "mcq pdf" and "wkhtmltopdf", suggesting a lure to download or view content that ultimately leads to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/strik?utm_term=nationalism+in+india+mcq+pdf PDF link annotation
    • https://cdn.sqhk.co/nutanujel/gfhaQTG/diners_club_rewards.pdfIn PDF document text
    • http://edayafar.xyz/pacify_her_lyrics_cleanedlo8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475859/normal_5ff1b52c8de89.pdfIn PDF document text
    • http://nebibila.iblogger.org/crock-pot_4.7l_hinged_lid_digital_slow_cooker_-_black_instructions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472188/normal_6019f1595ccba.pdfIn PDF document text
    • https://cdn.sqhk.co/dosojegomugu/RgneSgi/9463580422.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/ig24jfv/livezufuvufekero.pdfIn PDF document text
    • http://magnifioco.site/google_maps_api_v3_tutorial015n0.pdfIn PDF document text
    • http://select-get.top/4582822722x3deo.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/h8Theje/ping_pong_pool_table_top_costco.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/N7J47je/73767780185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_600fd9968b20d.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/gmjhejy/the_last_stand_union_city_whistlers_forest_walkthrough.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470205/normal_602aeca600943.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/hUIXM9n/terujomosowalowo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_6015b22671010.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/wqjjjbu/super_soccer_champs_2019_vip_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454281/normal_601f1d43490d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vokerajud.epizy.com/fobefanojos.pdfIn PDF document text
    • http://romisov.epizy.com/punesegexuji.pdfIn PDF document text
    • http://sijurajogo.epizy.com/developing_reading_skills_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 4972 bytes
SHA-256: 692c3ddef69383ef224fac6ae82ac9b8de6c53313ffaae17897524ceb5e648e7
font_01_sfnt_off0001036f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036F 10300 bytes
SHA-256: 8f6cfb2f5ceda7df463ccb29a0a07f6f84d5a7e41d35598be4a2ddc242a58195
font_02_sfnt_off000125e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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