Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb52be2e71a756c…

MALICIOUS

PDF

121.4 KB Created: 2021-02-28 02:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d3ab3b8100232363e98ac951c5a417f5 SHA-1: e34f2179ea35f612d57eb463852f1b68812dae89 SHA-256: adb52be2e71a756cfeed1fd3c2562a20e0194e1b2ce1bfc64667353b91991858
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to potentially malicious or link-farm websites, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'chemical compounds of coffee', likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=compuestos+quimicos+del+cafe PDF link annotation
    • https://cdn.sqhk.co/wosepimi/ibWgeuM/zaniri.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/44a071bae6.pdfIn PDF document text
    • http://naturaleone.space/the_almighty_sometimeslur17.pdfIn PDF document text
    • http://pesale.pro/haccp_plan_template_uk71gf0.pdfIn PDF document text
    • https://bawusazatodopam.weebly.com/uploads/1/3/1/3/131378774/9191388.pdfIn PDF document text
    • http://jagefefixod.22web.org/all_information_about_pakistan.pdfIn PDF document text
    • https://cdn.sqhk.co/farukisinu/dJijc4q/combat_commando_secret_mission_free_shooting_games_download.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/c99f128.pdfIn PDF document text
    • http://mugedly.xyz/gigipuxoxemuzedekutitasitrj0dt.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/gdBxm9S/tanks_but_no_tanks_board_game.pdfIn PDF document text
    • http://microdigitalmeter.xyz/60838934581i54pp.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/njdgfja/human_fall_flat_free_ps4.pdfIn PDF document text
    • http://circleshtang.xyz/ec_council_chfi_v8_study_guidejo425.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/sowosorefexe.pdfIn PDF document text
    • http://foxebunuref.epizy.com/42200460197.pdfIn PDF document text
    • http://pupudewasoxo.epizy.com/15644902042.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/insurrection_wow_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/83088305673.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_off00019007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19007 5236 bytes
SHA-256: eaa7f689b562406fa0ccdfcd438fa23fd1c4d8b096802b8e75cd2a6a9de1f663
font_01_sfnt_off0001a1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1C4 17584 bytes
SHA-256: a11d723078f453b82171e0f665c164c4bbe9fbd25f2c2a8e19c08af1e2d666dc

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