Malicious PDF — malware analysis report

Static analysis result for SHA-256 367190d8a2a49021…

MALICIOUS

PDF

116.0 KB Created: 2021-03-20 02:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c8d1070d2a83d15c2f93055f2da2aaf5 SHA-1: 288519be0d0750f0f0e7487ab3e08d136128352e SHA-256: 367190d8a2a490218de6b91e982d2e6116dbfa7400cbb82e891275dcc97530b9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to "the lottery worksheet answer key", suggesting a lure to a phishing or malware distribution site. The presence of external URIs and link farm heuristics indicates a strong intent to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://mezovuduw.ru/wix?keyword=the+lottery+worksheet+answer+key PDF link annotation
    • https://cdn.sqhk.co/rolaravez/i5oR4xI/drifting_meaning_in_malayalam.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/ii1jbid/perfect_barber_shop_hair_salon_games_3d_online.pdfIn PDF document text
    • http://universe1.space/this_is_living_hillsong_chordspb9zh.pdfIn PDF document text
    • https://fapudunaga.weebly.com/uploads/1/3/0/7/130776769/2d938bd.pdfIn PDF document text
    • http://medway24.com/motorola_ht1000_for_sale8eg01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386361/normal_5fe56a4fb53a0.pdfIn PDF document text
    • http://topplafond.xyz/autocad_to_converter_free_download_onlines9b0z.pdfIn PDF document text
    • http://gloslides.com/order_of_operations_decimals_worksheet8iv3e.pdfIn PDF document text
    • https://lolidinol.weebly.com/uploads/1/3/4/8/134884516/3650402.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/rXjajhG/razas_de_perros_medianos_peludos.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jfSihhd/how_are_basaltic_plateaus_formed.pdfIn PDF document text
    • http://neyroskakalka.site/python_for_loop_list_of_dictionarieslfods.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/5422c0530c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424347/normal_604192bfbe7c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424646/normal_5ff1edc4f2b3b.pdfIn PDF document text
    • http://komarovskii.xyz/detojoworinujokenobuvesegj5et.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/1537877.pdfIn PDF document text
    • http://habercigo.com/best_guitar_theory_course4ql0f.pdfIn PDF document text
    • https://cdn.sqhk.co/sejarepezibo/7TxzUnG/live_wallpaper_iphone_ios_13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://s3.amazonaws.com/purufiz/17909167294.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/7222710182.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/counter_strike_global_offensive_maps_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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13467 3684 bytes
SHA-256: 85d30f72a7ea18be7a7348daea7fecc1b58261ceb0a1b212b87643812aa06c9c
font_01_sfnt_off000141a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A2 4980 bytes
SHA-256: 4f87f67299ec087798c3c08acfd90c4e4c73e8bff983f4b005dc1ecf9216fd41
font_02_sfnt_off000152a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A0 17004 bytes
SHA-256: b19090879ce7d120cbc1877934a1ae74781037b31950a8b99483b0edfbc5cbfa
font_03_sfnt_off00018a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A51 17460 bytes
SHA-256: 87577aafc8c88315f3aa0ebbbb45f02136e56727c1db7ae4823725e4612efd8e
font_04_sfnt_off0001a455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A455 3120 bytes
SHA-256: da793f1d8d8c1e69a9e1a8dceefe0fcc553b552318ac3e53b0f102899ea6afc0
font_05_sfnt_off0001afbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFBB 6332 bytes
SHA-256: c521f04259192be294b964d277e791edbade136c3abd3634166c38d4cfc68080

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