Malicious PDF — malware analysis report

Static analysis result for SHA-256 46337a5160141129…

MALICIOUS

PDF

103.8 KB Created: 2021-03-26 09:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eda70554d21cb7ac3484601a85daca7d SHA-1: d17b207449445e2efba5ff3a4cee51213b384e7d SHA-256: 46337a51601411296937a734d48bed68c6540bfa64d9a4d7b1f6c91c0db435d5
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to a link farm, and the presence of URLs like 'https://seumenha.ru/strik?utm_term=average+salary+for+entry+level+public+relations' indicates a phishing or SEO spam lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=average+salary+for+entry+level+public+relations
    • http://pefiworawodud.mypressonline.com/7368194190.pdf
    • https://cdn.sqhk.co/rumobotituda/hcjeiej/zeus_tattoo_waterbury_ct.pdf
    • https://cdn.sqhk.co/gixobujikelu/gDEOmhh/internal_organizational_communication_plan_template.pdf
    • https://cdn.sqhk.co/fovuxugo/geVhjcW/nature_and_scope_of_business_finance.pdf
    • https://cdn.sqhk.co/sunomedude/ijj7hf1/evowars._io_hack_online.pdf
    • https://cdn.sqhk.co/nepodowu/SHheB5k/activity_launcher_1._7._0_apk.pdf
    • http://momarivido.mypressonline.com/manual_de_organizacion_y_funciones_empresa_privada.pdf
    • https://cdn.sqhk.co/minamojazi/TLzXDOd/19647824032.pdf
    • https://cdn.sqhk.co/zejejofe/dPgcuIV/vifudaku.pdf
    • https://cdn.sqhk.co/sofizagumup/fhfPhj9/10740426907.pdf
    • http://zetumitufam.mywebcommunity.org/4847691179.pdf
    • https://cdn.sqhk.co/desogepupema/gjjhTFl/stupid_zombies_mod_apk.pdf
    • https://cdn.sqhk.co/dulunukosep/fdBphc3/foliage_report_in_vermont.pdf
    • http://rujisuki.mygamesonline.org/95530675214.pdf
    • http://feremujidonigu.getenjoyment.net/99055774756.pdf
    • http://supobesopo.mygamesonline.org/how_to_run_python_script_in_atom_linux.pdf
    • http://tozidak.mygamesonline.org/defenetizotugal.pdf
    • https://cdn.sqhk.co/kisesawaropo/cgcibif/61241546723.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://koduwutuvage.onlinewebshop.net/binomial_theorem_a_level.pdf
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_040d28d113ec4f5d8497943e4fc38c46.pdf?index=true
    • http://mejumobax.atwebpages.com/87320445032.pdf
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_ff8c16f8160d4b929923941bec69f1f2.pdf?index=true
    • http://desujiruvomeb.myartsonline.com/sociology_books_online.pdf
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_8b477a50cf1c4f8f81a68918223893e1.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_off00015595.bin
9cfa309b7be3052c5af3b794fc7861888f6c5f79c2d0495500e11c552634c972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15595 5472 bytes
font_01_sfnt_off00016858.bin
4484c02b22fb6dc1361aad0f37614a97430b752a9aec4ad3db1b9e50e6a96cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16858 12924 bytes

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