Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc18b7ad98813adb…

MALICIOUS

PDF

73.2 KB Created: 2021-02-27 13:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ed7d0116b2d2cc8a094481314d5ce21f SHA-1: 8af1b9d2ed46ad298a765e53de0c40a5d3df5389 SHA-256: fc18b7ad98813adb37f393874b95950a00458416407b4aab8cfab2735a2b85a3
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/award?keyword=how+to+save+your+marriage+before+meeting+your+spouse PDF link annotation
    • https://cdn.sqhk.co/raserijene/figPoEd/wudiruma.pdfIn PDF document text
    • https://jivefumo.weebly.com/uploads/1/3/0/7/130776755/vularilukipavo_nexatotapa_xulotarawirowe.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/cji7jf6/superhero_suit_design_ideas.pdfIn PDF document text
    • http://snatural.space/275880404111surx.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/pudovalofowolege.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/gqav7jg/guxisukena.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/how_do_covalent_bonds_form_atomsvwqon.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/vXhfgiS/best_traditional_archery_shooting_glove.pdfIn PDF document text
    • https://jodulimije.weebly.com/uploads/1/3/4/7/134732884/salawakojabe.pdfIn PDF document text
    • http://shtangye.xyz/94945598643q0ncs.pdfIn PDF document text
    • https://kenuzoba.weebly.com/uploads/1/3/4/0/134017938/gikezidukigoworizoz.pdfIn PDF document text
    • https://jodejivosarixu.weebly.com/uploads/1/3/4/3/134314211/93bdb506ca538d.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/the_long_haul_rodrick_funny_moments.pdfIn PDF document text
    • https://lelodudovoveju.weebly.com/uploads/1/3/1/6/131607117/wugisifif-wonubeluva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuzivapevof.epizy.com/android_developer_key_skills.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_off0000dece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 5544 bytes
SHA-256: 4657df5b8cf1d582f721147a5a290d5efe3a49e8ab8f85fe81794336cad6b52b
font_01_sfnt_off0000f1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AF 10968 bytes
SHA-256: e829f73840f793a74c18267dd5dc44579421f609c66d5cfc4afd4874709dd1bc