Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e734afbd6885a34…

MALICIOUS

PDF

74.4 KB Created: 2021-02-20 06:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c08e26d7d790e122f1e376b7975c5162 SHA-1: 7d25abbf75f10616fdcce7c83f01e4198d312279 SHA-256: 0e734afbd6885a34c4a567be5aa0f6ba80610226e2f4d65c990e4d93d33394e5
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 pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this being used for malicious purposes.

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://maypoin.ru/wix?keyword=sam+x+dean+x+reader+lemon PDF link annotation
    • https://cdn.sqhk.co/dugixikisim/jiIAEQm/wakusesetolukewidof.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/NghGtCQ/navafelej.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/dLviehh/voa_amharic_news_live.pdfIn PDF document text
    • http://vizit.store/saparimuwimufyb23.pdfIn PDF document text
    • https://cdn.sqhk.co/bomaguvodar/WigidVB/dabolenetotibezaz.pdfIn PDF document text
    • http://espacecmb.xyz/how_much_does_a_padi_rescue_diver_course_costj3xrh.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/dhBhghg/check_cashing_store_near_me.pdfIn PDF document text
    • http://jilet2.club/bogan_movie_bgm_tonesarva2.pdfIn PDF document text
    • https://cdn.sqhk.co/dijadive/geihoTv/okra_project_rating.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/Mjdbwq3/flight_simulator_2020_controls_xbox_controller.pdfIn PDF document text
    • http://baluninelekab.22web.org/midsummer_nights_dream_symbolism.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/je1pkib/the_tiger_rising_read_aloud.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/Ehbihgc/best_sound_quality_music_player_for_pc.pdfIn PDF document text
    • http://the-job.ru/anderson_cooper_360_podcastc0mn6.pdfIn PDF document text
    • http://spainsale.pro/sixuxinelukokutamunetl48ao.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/gdhfhfK/nawikedomusimirarujakubol.pdfIn PDF document text
    • https://cdn.sqhk.co/fozuwasixeja/wgerzij/nabidilanagesatosuvawusor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejanubotikepiw.rf.gd/jaspersoft_studio_vs_ireport_designer.pdfIn PDF document text
    • http://lelirovosas.epizy.com/les_mis_finale_song_lyrics.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_off0000e867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 4964 bytes
SHA-256: 9e52e27bf8d9e5c676d249aac720e89ffea46988a166e8be6eb40f15d8ec70a4
font_01_sfnt_off0000f932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF932 10356 bytes
SHA-256: 88b9e2e341ee4430ae3e61fb0cfb7c23dc5d6f79abe465528347328eed794064

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