Malicious PDF — malware analysis report

Static analysis result for SHA-256 518115f4bb7673c2…

MALICIOUS

PDF

78.4 KB Created: 2021-03-12 22:12:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d79f86cbd826b004dd7bd9aa9b4aa254 SHA-1: beee3f2e8597cd0ca54cc8f207e51d7fc533dbcf SHA-256: 518115f4bb7673c2062bd7308bb6f40de5971cda7972f56154742a1f838e6211
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting or known malicious redirectors, suggesting a phishing or scam attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this. While no scripts were explicitly extracted, the nature of the links and the ML classification suggest the document's primary purpose is to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=aleister+crowley+magick+pdf+download In PDF document text
    • https://jibokogemi.weebly.com/uploads/1/3/4/7/134767321/bulosipuk.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/hunger_games_catching_fire_watch_online_123movies.pdfIn PDF document text
    • http://itravelgr.com/car_games_apk._comusciw.pdfIn PDF document text
    • http://vovavipegum.getenjoyment.net/76867380752.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/hjDfhiG/shoot_bubble_deluxe_online.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/jigeIhf/mobekese.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/j71iit7/celestial_bodies_book_summary.pdfIn PDF document text
    • http://fexodubavilukub.22web.org/3_generation_family_genogram_template.pdfIn PDF document text
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/79867503f0ba.pdfIn PDF document text
    • http://copyright-helps-team.com/begokujk0di.pdfIn PDF document text
    • https://rudadikisoma.weebly.com/uploads/1/3/1/6/131606677/7396003.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/what_is_non_economic_loss.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vewomani.rf.gd/semalofupepezilutudukugom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3da3b9-372b-44f2-b8aa-88962e667d18/liwebijasedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72cf67f-a22d-4c12-8587-3adac2f01201/kuvofixeziwabilokijo.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/microsoft_senior_program_manager_interview_questions.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/android_studio_gradle_resolve_dependencies_slow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f28fc80-c0db-4aa7-a7e2-791cdce1d3a6/who_animated_one_punch_man_season_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9698aa-4384-4f75-8617-dd651fc050f7/rojaxez.pdfIn PDF document text
    • http://kewugozosefo.epizy.com/jigoruwesavibuf.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000f311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF311 5720 bytes
SHA-256: eeb3936cca8f3b0d0fffc5c6747e6d5cda349e2752c6e74459b5ac6a7b2ff9c4
font_02_sfnt_off0001069c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069C 10948 bytes
SHA-256: 789042aefa8589a485fe0626663f67f75753c57e47a9d3d0359ba2099a57fe2a