Malicious PDF — malware analysis report

Static analysis result for SHA-256 490432aef0875556…

MALICIOUS

PDF

76.9 KB Created: 2021-04-04 22:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d8c1edeed538a9c2684db2b4f5e2b362 SHA-1: 29a7f772a35b8a5aa0c2f4b6cfbbba4442c58b75 SHA-256: 490432aef0875556c545981d057df81702163578a9d04599c9f4acfb33957769
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and ClamAV detection. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the overall structure suggest an intent to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://zajinet.ru/strik?utm_term=it+essentials+chapter+8+checkpoint+exam+answers PDF link annotation
    • http://juborad.mywebcommunity.org/javascript_tutorial_tutorialspoint.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384472/normal_5ff6d34e0b5a8.pdfIn PDF document text
    • http://antonioit.space/57060310714g81dz.pdfIn PDF document text
    • http://vuvodagedene.scienceontheweb.net/concepto_de_bienestar_psicologico.pdfIn PDF document text
    • http://erogan-encolumbia.site/can_i_change_my_address_online_dmv_nckjigf.pdfIn PDF document text
    • https://cdn.sqhk.co/lilokimoz/jigeLlJ/31836700654.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/solubility_test_of_bitumen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_6045e6df2d978.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/InTQugj/ruzokiziniwinofuwitiga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449984/normal_5ff75afc2e522.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453719/normal_5ff95f263113d.pdfIn PDF document text
    • http://twirlini.com/315153506o3m72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fc6af5f9f8b5.pdfIn PDF document text
    • http://apkweb.net/28351385456smsq6.pdfIn PDF document text
    • http://musofiron.ru/potana_bhagavatam06btl.pdfIn PDF document text
    • http://muzoc.xyz/vista_21ip_installation_guidegj4lt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_a41ef0c49b284289bb4224431b227895.pdf?index=trueIn PDF document text
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_b44de4fc4c7c443abb92fc879bdf55df.pdf?index=trueIn PDF document text
    • http://nabafutig.myartsonline.com/saxirelejeda.pdfIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_65342e5e762f42c39ea88fcaa1b22b71.pdf?index=trueIn 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_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 5528 bytes
SHA-256: d96902d621f602f27cf46d4b2afb1a2ee4c760f507a28291ab79fdbb6e070ea5
font_01_sfnt_off000100e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E8 10920 bytes
SHA-256: 5c6a694c3dbc47ff7da4740776d34d1afb3c653b7a83c58de0850a7427d004de

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