Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fde66d899be6a48…

MALICIOUS

PDF

89.8 KB Created: 2021-05-04 00:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b922cddf11564942f5b0615dc665ae52 SHA-1: 626ac7fd2d08ba0c92bcac85831a8409cd389623 SHA-256: 8fde66d899be6a4897f61f14043a1a22b1f235c7cc5589f7d0bf1bc6f4dd441d
126 Risk Score

Malware Insights

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

The sample is a PDF document that exhibits characteristics of a phishing lure, specifically using a Garmin Forerunner review as a pretext to direct users to a malicious URL. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide malicious content or redirection mechanisms. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or link-farming attack pattern. No scripts were extracted, but the PDF structure and external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=garmin+forerunner+110w+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417039/normal_5fee8ef2b1c0b.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/data_analysis_using_regression_and_multilevel_hierarchical_models_gelman.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_600e9e11e6053.pdfIn PDF document text
    • http://kefowawud.22web.org/36116824839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_6025947ab60a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_6041144e0db93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493541/normal_5fcc9995dbd59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5ffa2f881764c.pdfIn PDF document text
    • http://liropade.22web.org/xapenorowari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_602575419c6f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_60316b4617c5a.pdfIn PDF document text
    • http://jebumivusesujan.iblogger.org/biuret_method_of_protein_determination.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb1971d-542c-4756-9cbb-5e4d48d06bba/reloading_equipment_cabelas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/006097d3-a793-4f22-a407-79d1a09a7d55/how_to_make_fake_auto_insurance_card_free.pdfIn PDF document text
    • http://sobezoneroli.epizy.com/50539207192.pdfIn PDF document text
    • http://xipofak.rf.gd/kajikekod.pdfIn PDF document text
    • http://kuxibugasesi.rf.gd/mapa_politico_de_africa_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4dc4ff0-a742-4be7-8270-50758b030832/vilujisuporawuwek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998f36be-53c4-48f6-b982-1b37110c7549/pukofexedirexebufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f1e9a68-ab16-450f-8df2-d2005d98b18d/9417611836.pdfIn PDF document text
    • http://monifixo.rf.gd/89427291485.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_off000113a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A8 5080 bytes
SHA-256: 8a9a1f26f9b0a911171f234d89b946016541d72e30e979d51408e2bdfd58a289
font_01_sfnt_off000124fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FC 23680 bytes
SHA-256: 787b33c902cd8addef33cd0ebe47b1af13776bdf0c4d2dae7e6390c410874a9b

Open this report in the interactive analyzer, or submit your own file for analysis.