Malicious PDF — malware analysis report

Static analysis result for SHA-256 211278f03f80975a…

MALICIOUS

PDF

83.2 KB Created: 2021-04-16 10:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c9f964908e162855f5fc1bc611140d32 SHA-1: 22f76773a8c3e0c619919c27ecf8172f4317dd1a SHA-256: 211278f03f80975ae780516e2eeb410ded050d91b6f3f4c990fccf6910bd1e50
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, appears to be a lure related to healthcare scorecards, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/strik?utm_term=what+is+balanced+scorecard+in+healthcare PDF link annotation
    • http://itawegan.space/66357326235hqxbz.pdfIn PDF document text
    • https://jedagafigi.weebly.com/uploads/1/3/1/4/131438055/tinitufamula.pdfIn PDF document text
    • http://mabirimelu.iblogger.org/hotpoint_ariston_manual_oven.pdfIn PDF document text
    • https://rusokakes.weebly.com/uploads/1/3/4/0/134016884/7742352.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_5fcf26b51d5b6.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/xupezededutiko.pdfIn PDF document text
    • https://zulupilasafa.weebly.com/uploads/1/3/1/1/131164294/bizibapanudev.pdfIn PDF document text
    • http://mini-cam2.club/vampire_diaries_season_1_episode_1_wsht44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462056/normal_5fdde68208bb9.pdfIn PDF document text
    • https://mabunamu.weebly.com/uploads/1/3/4/9/134902385/8960829.pdfIn PDF document text
    • http://nedavupagisezim.mygamesonline.org/attaccamento_e_amore.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/2837881428.pdfIn PDF document text
    • http://dovulup.iblogger.org/lapimuvokorujesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_6023d2fe780f1.pdfIn PDF document text
    • https://jetakazam.weebly.com/uploads/1/3/2/8/132814031/8757295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_6062af5062175.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fumesowira.epizy.com/chernobyl_parents_guide.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/xuravewixeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3f25f8-987f-4b76-a12e-832b30de5f8e/xebolizomatajamafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4eb2ad9-3af6-4518-a3a7-6af0755e6bce/7841445775.pdfIn PDF document text
    • http://pujumek.myartsonline.com/malaria_parasite_metabolic_pathways.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1467741d-c0be-45d1-9273-c4e2bddc77d8/stanley_fatmax_spotlight_usb_charger.pdfIn PDF document text
    • http://mebewoxesare.epizy.com/zonunut.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_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 5180 bytes
SHA-256: d04e0862f855fb0a912a577e629b37ca14d980830390aa7235dc9c29583a8d31
font_01_sfnt_off000115aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AA 11940 bytes
SHA-256: 011eb6225095600cea5ffae15c8caa6f51601ea1edfcd78fe1f7eccab06d56b3