Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e617049c6782c8…

MALICIOUS

PDF

63.2 KB Created: 2021-02-20 22:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 39b8c9fb650d12f44d63e336c14585be SHA-1: b0e18ea001b82f0c6cb5614d785d065263f6cf0a SHA-256: 23e617049c6782c8abb4fdb2e5984ca27efa728d1631c611cb9bae4953e66cbe
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The document contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs strongly indicate a phishing or malware distribution attack pattern.

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://seumenha.ru/strik?utm_term=bj+betts+lettering+guide PDF link annotation
    • https://cdn.sqhk.co/gituridewo/gidAgdA/old_time_rock_and_roll_internet_radio.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/MMjeihW/kaiser_permanente_physician_jobs_san_diego.pdfIn PDF document text
    • https://cdn.sqhk.co/bibunifez/02ggRIR/rivals_at_war_firefight_mod_apk_offline.pdfIn PDF document text
    • http://valobunobatab.iblogger.org/english_for_dummies_book.pdfIn PDF document text
    • http://evatopshop.xyz/free_descriptive_writing_graphic_organizertm996.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505771/normal_5fe1cb3465b52.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/DigHer8/strategy_games_online_unblocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469355/normal_5fcf01d090dd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fd5f328eeb1b.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/6Mhbhah/how_tall_is_juicy_fruit_snacks_youtube.pdfIn PDF document text
    • http://goodshopsales.xyz/that_s_you_ps4_trophy_guidezx9r4.pdfIn PDF document text
    • http://italylife.pro/soda_dungeon_poison_shroomij06z.pdfIn PDF document text
    • http://vuzatiriranune.22web.org/97383535407.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/siehcLw/37831358344.pdfIn PDF document text
    • https://cdn.sqhk.co/fopalixogul/MjdSEtk/wobofavamomujataxeduku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mesitineka.rf.gd/sufiloliris.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_off0000bbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC7 5048 bytes
SHA-256: 94e2e641e5694b4719ab5eebf2bdd42e6a41e0b5967052368e573150633e575a
font_01_sfnt_off0000ccff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFF 9820 bytes
SHA-256: 96d849a19928d970dc9111460f3a0e9f73fcaafa2f94207b68ce5d1053dd70a3

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