Malicious PDF — malware analysis report

Static analysis result for SHA-256 3589d2d6f09923b8…

MALICIOUS

PDF

75.1 KB Created: 2021-04-07 14:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68e6cd424d8402f5d21da111947b2750 SHA-1: d639ba0b518334826a63d0dc1dcba9f5c33ccec0 SHA-256: 3589d2d6f09923b8a1ecf03eeea6d9075a19e205ca1c8b24baeac12fee00168a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The primary URL, https://resalured.ru/strik?utm_term=echo+gt+225+price, suggests a lure related to pricing or product information. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/strik?utm_term=echo+gt+225+price
    • http://vejofewi.iblogger.org/project_management_professional_certification_verification.pdf
    • http://moxegelubopidi.sportsontheweb.net/somewhere_over_the_rainbow_ukulele_chords_glee.pdf
    • https://kudokazapa.weebly.com/uploads/1/3/1/4/131452939/6bc2f4c22fadb.pdf
    • https://rajepejejema.weebly.com/uploads/1/3/4/8/134860913/dopixonexaniguv-kuvarotir-tudekenu-nejujuditakuja.pdf
    • https://mofomajem.weebly.com/uploads/1/3/4/3/134349017/bofefomubojozamutefe.pdf
    • http://vuzetasavuxoso.mygamesonline.org/3901729638.pdf
    • https://dekukosozo.weebly.com/uploads/1/3/1/0/131070054/83e0325cd1b86.pdf
    • http://lijupezowu.22web.org/80459784392.pdf
    • https://wotujajatedigi.weebly.com/uploads/1/3/5/2/135295120/9526859.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jawevobafepen.epizy.com/zoxefumerak.pdf
    • http://fibubaxuvuvixik.epizy.com/57061805205.pdf
    • http://wasofiwomorap.epizy.com/kizovupekir.pdf
    • http://pirafabitibabik.rf.gd/wojivizigusifem.pdf
    • http://zazufazujinuzo.rf.gd/ishares_core_msci_eafe_etf_fact_sheet.pdf
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_f4c4761f82df4f679beb728d325bbd2f.pdf?index=true
    • http://magotabitujotu.rf.gd/97666558965.pdf
    • http://diwevobu.rf.gd/excel_advanced_skills_writing_workbook.pdf
    • https://adea4596-07c4-4c45-ba97-107779ed6dc5.filesusr.com/ugd/5bd9e2_8b4395e94aa1495f890012a29bc030bc.pdf?index=true
    • http://vajapojaperusu.myartsonline.com/combiner_plusieurs_en_un.pdf
    • http://xazexunipix.epizy.com/wolonuxexixizelufilotin.pdf
    • http://kusukod.epizy.com/agile_testing_techniques.pdf
    • http://wirobateruku.rf.gd/i_feel_what_you_feel_quotes.pdf
    • http://pumejusatojajeg.rf.gd/fortnite_avengers_endgame_apk.pdf
    • http://mejumobax.atwebpages.com/hegemonic_war.pdf
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_93744e6e62b24c709d96716d470b4404.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bc.bin
80787a8db98408f7f565f99d2b96f128b48505d4fec6abc2b3361625512ae501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BC 4988 bytes
font_01_sfnt_off0000f6c1.bin
a24b53b1a5c7bdcc054667bd7a1e412b943d897a10277d4d8938d15c806a7292		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C1 11456 bytes

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