Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40f736694d9d501…

MALICIOUS

PDF

69.2 KB Created: 2021-02-18 04:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4f06f40bdea7ef9996f0693948b38952 SHA-1: 03c6407c6fdb25f451db3c16570cf494ca348651 SHA-256: e40f736694d9d5015f173c26cb10ba76b210b1eb9c5dc61e84ed661826a2f709
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it is used to redirect users to phishing or malware download sites. The document body, though partially obfuscated, appears to be a lure related to 'solving trig equations worksheet pdf', aiming 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://druttle.ru/wix?keyword=solving+trig+equations+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/nomazotesi/hctcfhd/kung_fu_panda_legendary_warriors_wiki.pdfIn PDF document text
    • http://contentmedialiteracy.com/soxefugozobovupoteudim7.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/jhghXje/3201236821.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/gjcGBmj/jogilukuxikibumam.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/bgd1jiS/30420221417.pdfIn PDF document text
    • http://pepirizibizedel.22web.org/apa_format_cite_article_in_magazine.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/NiUmZjc/forgotten_tales_mmorpg_online_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pometobab/jiftShe/lopujamoraxud.pdfIn PDF document text
    • http://stavki-na-sport.site/anti_ragging_offline_form8ys03.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/ghPje6W/best_ringtone_2020_only_music.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/xuzajobutuw.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/QFhhgfI/annoying_sounds_for_dogs.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/ghfhijd/screen_recording_with_audio_free_software.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/81792988270b5w5s.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/dhijcRP/foe_helper_fur_firefox.pdfIn PDF document text
    • https://cdn.sqhk.co/xijisejes/idigjhd/wovax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunimesigo.rf.gd/cashflow_the_investing_game_cracked_apk.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/beholder_5e_monster_manual_stats.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_off0000ce4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4D 5748 bytes
SHA-256: 47efb9ae8833bbd35500228a737f3c8d876846af085d5819af83a4f73aedec32
font_01_sfnt_off0000e1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E3 11144 bytes
SHA-256: a00fc2e650fa464e23ea0505544659f305f5bea45bd5f91a9188339fb78e9090

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