Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd3e54acae3d67a…

MALICIOUS

PDF

78.0 KB Created: 2021-04-04 04:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c4602e5ed700be7befd4c2644fe19f9e SHA-1: 93ed416eacee6fa614eb53a94e779798ffb97f78 SHA-256: fdd3e54acae3d67a8806c6f672b8193b9e79ed2b72726f6401ca24e85d4d9607
166 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the high number of embedded links pointing to potentially malicious domains. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure and numerous external URIs, including one that appears to be an exploit link, point towards an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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.
  • 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/strik?utm_term=last+of+the+mohicans+theme+song+piano PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383295/normal_60421cd86cd24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_6051bccd2097d.pdfIn PDF document text
    • http://vbnmcxz.xyz/microsoft_wireless_keyboard_2000_v2.0_drivert4kn2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_605849d31cac0.pdfIn PDF document text
    • http://domobifotuza.sportsontheweb.net/how_to_deal_with_the_fear_of_death.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_6035952fbc5a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_605c6580147d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426819/normal_60201176479ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489844/normal_60296530bf2a6.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/reduce_file_size_using_acrobat_pro_dc.pdfIn PDF document text
    • http://banikomapi.22web.org/actinomicosis_oral.pdfIn PDF document text
    • http://dwatches.site/kipetuzinulidaxobuwgm20p.pdfIn PDF document text
    • http://privateguardingserviceagainstdanger.site/42506758323nifjq.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/5093833013.pdfIn PDF document text
    • http://gekujiga.iblogger.org/17022111542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451212/normal_5fddd321d87d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d140e5a-2384-47ed-9b3c-83f09a1dd2d0/2017_nordictrack_commercial_1750_assembly.pdfIn PDF document text
    • http://jokajovasoxaruf.epizy.com/agendas_alternatives_and_public_policies_kingdon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bcf416d-91b9-414a-a909-4a0ada5f9206/losamibinibudelufonidewaz.pdfIn PDF document text
    • http://sidumekubasib.epizy.com/air_pollution_control_a_design_approach_solution.pdfIn PDF document text
    • http://tuteninuxad.rf.gd/warimupunofezedunolubow.pdfIn PDF document text
    • http://gozuketitara.onlinewebshop.net/32770846838.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_off0000f107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF107 5244 bytes
SHA-256: 28a24f2d69c6f1b0dd5c29b6380d0fb39b2fdf27bcb67195b2ad0be9286fb95f
font_01_sfnt_off000102c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C6 11904 bytes
SHA-256: 6ee4425fe209666915c14e25c1df876e600d2c6d11dc343712bb91e1713fa0ad