Malicious PDF — malware analysis report

Static analysis result for SHA-256 9544286500a9b4ac…

MALICIOUS

PDF

104.7 KB Created: 2021-04-29 12:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f922d485fd576e4cb86628bcbdd8d400 SHA-1: a471c4217a5ddc3bbe42bd234f68a191cdd08bd1 SHA-256: 9544286500a9b4ac803e75bc7e35ddc1f4a172adbee9af538e9060faf48a9008
166 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous links to external websites, many of which are hosted on disposable domains. Heuristics indicate it is a link farm and an advance-fee scam lure, suggesting the user is tricked into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ponafet.ru/strik?utm_term=how+to+reply+to+a+good+restaurant+review PDF link annotation
    • http://kadabafomelu.66ghz.com/what_happened_to_bob_ross_paintings.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/english_idioms_dictionary_download.pdfIn PDF document text
    • http://ridunculus.com/arsenal_vs_tottenham_match_highlight9it9w.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/sinergia_definicion.pdfIn PDF document text
    • http://timatesanuvufav.iblogger.org/nelifemirekuwut.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/71223530981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494866/normal_6014afcd701a2.pdfIn PDF document text
    • http://xikimifo.66ghz.com/crystal_reports_8._5_totext_function.pdfIn PDF document text
    • http://bottlechainworld.com/27314272386bgetj.pdfIn PDF document text
    • http://alex-chekalev.com/4421587775126ddv.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/41040593427.pdfIn PDF document text
    • http://topstudy.fun/vapegupunizexewawi5l7np.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_60159e584f2ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5fda5ac044d75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_c937067a25b34ab8af8705e31c20d853.pdf?index=trueIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_2a9982cb6b5d498689960a5e3d7cf8e2.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_2f81aed5dbb2400c9cd42da5b8de397b.pdf?index=trueIn PDF document text
    • http://zemonipovop.epizy.com/gefedepazufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e245c8-2f24-4c28-b3d7-89860cf5b855/tudasaliwerowaludelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375ddc83-def9-4c1d-a026-a7650ba8d393/what_is_portfolio_management_pmi.pdfIn PDF document text
    • http://novizazabejapi.epizy.com/formato_de_entrevista_semiestructurada_para_nios.pdfIn PDF document text
    • https://3315be42-5dab-4b6e-b44d-105cb490973e.filesusr.com/ugd/2e3488_a352d3b511de443294996d5d2c4e3070.pdf?index=trueIn 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_off00015bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BBA 5344 bytes
SHA-256: 4f1bd5231be74b842faa48bfc1899e8aa1b54b225b179b3330b7285dd4b8ca38
font_01_sfnt_off00016e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E0E 11620 bytes
SHA-256: ee315397565359589156ad3f0d82bb4dc9363e1f449bdff43adec38d4ad87622