Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a767d374a19310…

MALICIOUS

PDF

87.3 KB Created: 2021-03-03 14:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e130aea44db2dbac2d7c5cbbc53a3015 SHA-1: 8bda86df332d63ab298009d90de104c139884d00 SHA-256: 91a767d374a19310322e2899ac59ce375192ced48de426777a64635d91f231e2
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the lure to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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/wix?keyword=donde+estan+las+cascadas+de+iguazu PDF link annotation
    • https://cdn.sqhk.co/mexovaru/haxggiU/mlb_vr_home_run_derby.pdfIn PDF document text
    • https://bapamebitisetup.weebly.com/uploads/1/3/4/3/134325238/fapog-xinisozewadof.pdfIn PDF document text
    • https://liwotagavujid.weebly.com/uploads/1/3/5/9/135961529/guwitiwaditowe_genaf_gobil_zumolizap.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/36353905814.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/24389777370.pdfIn PDF document text
    • http://xuvepawa.iblogger.org/how_sugar_changed_the_world_summary.pdfIn PDF document text
    • http://becloud.website/rugebujufunj35vc.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/qYhhbhd/stress_management_skills_definition.pdfIn PDF document text
    • http://werikipirojenob.scienceontheweb.net/tomitesorofeza.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/fazusisaboj.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/kavaluroponakoki.pdfIn PDF document text
    • http://wide-mean.top/worlds_impossible_game_unblockedcp6ug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakalegej.epizy.com/boxigizaxegarofa.pdfIn PDF document text
    • http://wijuromosumeko.rf.gd/papyrus_normal_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/brooks_and_dunn_free_music.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_off0001180f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180F 5060 bytes
SHA-256: afa78707b831f12e00771d08b5bc6aad757db1e2cb505fff51e422d238d806c7
font_01_sfnt_off00012965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12965 11404 bytes
SHA-256: f99c1623f850577dced44f88309be35de9048d849389337797bb7fd34fb068c9

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