Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e24c6d1d0b70c5…

MALICIOUS

PDF

81.6 KB Created: 2021-05-10 12:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 19c326ed8e4016da377ca0b66606996f SHA-1: dc74b52c14ebf9cfd2fcd22682752408e21a39e3 SHA-256: 05e24c6d1d0b70c5941d342f3fac84c95e71a3f4dede41bde9b21426d4a0d00a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains a search query that serves as a lure to entice users to click on the embedded malicious 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://zajinet.ru/strik?utm_term=what+are+good+two+player+games+for+ps4 PDF link annotation
    • http://tigatixe.iblogger.org/mafabokutepuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/lefidotoxono/cjbQhia/38193816573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_60285af3c2170.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_5fde0594a2d1f.pdfIn PDF document text
    • https://cdn.sqhk.co/kesokirow/kP8gejb/62728670102.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/rGjahak/salomivopubogini.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/boL4pAW/hofstede_insights_country_comparison_tool.pdfIn PDF document text
    • http://sidegut.22web.org/zexekexufete.pdfIn PDF document text
    • https://cdn.sqhk.co/gobenebovi/idNEDj3/xirolajinifenuzutis.pdfIn PDF document text
    • http://misiliv.66ghz.com/jungle_movie_2019_movies_counter.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/jhy4Kje/hd_wallpapers_battle_royale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478926/normal_5fdd725c44b4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_605a7cb81fbb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rawuwad.epizy.com/seloxetidojojifotaguwud.pdfIn PDF document text
    • http://mupowazige.rf.gd/kabavajepesu.pdfIn PDF document text
    • http://jilagikudi.rf.gd/a_travs_de_la_biblia_myer_pearlman.pdfIn PDF document text
    • http://zokepufa.epizy.com/work_study_in_apparel_industry.pdfIn PDF document text
    • http://kiwizenodemi.epizy.com/wiwet.pdfIn PDF document text
    • http://vimedunofonuw.rf.gd/vampire_diaries_season_1-3_summary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 5384 bytes
SHA-256: 6694b696d39bdd5ac3bddc6979624c4fb75867aef5087573ae43b21e118c5da4
font_01_sfnt_off000106b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 10664 bytes
SHA-256: f89baa4b808bdef827312a2314610dacf7173a64adcea756fd4b2f9e44a14f3c
font_02_sfnt_off00012b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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