Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b0761cd2d7eaa0…

MALICIOUS

PDF

75.8 KB Created: 2021-03-16 15:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7f496be91a42f21ba985df941ac81e2f SHA-1: 67b0cfa134bd4f9caddca6b548e327ca7d91fc40 SHA-256: 98b0761cd2d7eaa094aac99ee1092da2ad5f7e66944d2ded179366713115939a
126 Risk Score

Malware Insights

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

The file is detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with at least one, https://leonvi.ru/award?keyword=optimistic+nihilism+book+pdf, being flagged as suspicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a link farm hosted on disposable domains, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/award?keyword=optimistic+nihilism+book+pdf PDF link annotation
    • http://faketikus.22web.org/entresto_package_insert.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/how_to_use_blender_for_roblox_gfx.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/64028112850.pdfIn PDF document text
    • http://vazukororupob.22web.org/are_quasimodo_and_esmeralda_related.pdfIn PDF document text
    • http://tanivikovome.sportsontheweb.net/berad.pdfIn PDF document text
    • http://jukekabotika.22web.org/panasonic_aw-_rp150_manual.pdfIn PDF document text
    • http://tefosewun.22web.org/25888858742.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/vewamapojivefiz.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/kia_optima_hybrid_2013_owners_manual.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/clinical_case_report_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tozopovudot.epizy.com/video_collage_maker_online_free.pdfIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_5ef6b25188514a59b8d9fd457e79aa03.pdf?index=trueIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_43803bf8e21a4a579e95d9fd88ddc534.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/918653e2-ca50-4459-8fbf-5c16f86ff258/universal_audio_apollo_twin_mkii_solo_or_duo.pdfIn PDF document text
    • http://xusoromi.epizy.com/zowotufefazukagewijegugu.pdfIn PDF document text
    • http://lejaxofin.epizy.com/rupabow.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/york_diamond_90_furnace_not_working.pdfIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_99ed267a939e43afa3ffc6f39358c7ba.pdf?index=trueIn PDF document text
    • http://rijonitapadon.myartsonline.com/dudorizelofivazetekowil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50af1136-8997-4595-a8cc-8d6a9141181c/peace_like_a_river_book.pdfIn PDF document text
    • http://gazobulusobu.epizy.com/29691359926.pdfIn PDF document text
    • http://mevalegija.rf.gd/happy_birthday_to_you_pallavi_ringtone.pdfIn PDF document text
    • http://vafegenowakimo.epizy.com/34161302586.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_off0000e88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88A 5320 bytes
SHA-256: 8f40cca2d178f7b07bd7b39abee14466aef9ea7d1c5bba4ea235e852c536f570
font_01_sfnt_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 11704 bytes
SHA-256: fa13b17092e78990ac2535827b89d5f0dd4942c06d7b14441eb9aab362f82b57

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