Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd785bf1abbbf24…

MALICIOUS

PDF

72.4 KB Created: 2021-03-16 00:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e9f6fbb5b69c56e105c9b6590771a536 SHA-1: 088cb283ab4e6ba78582911b802b3cad982146d1 SHA-256: bbd785bf1abbbf2425e5368b3ce394c9f30dd293a6ec4b025391b0398c5a631e
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely intended to phish user credentials or deliver a payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=navy+maternity+instruction+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416789/normal_60344b9f19398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473938/normal_6013e678bdc35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408346/normal_604f041e1ce4d.pdfIn PDF document text
    • http://rikumoturukeju.iblogger.org/carpal_tunnel_syndrome_spanish.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481841/normal_60016ca5c33d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_6042ed5abf1d3.pdfIn PDF document text
    • http://pimazisiperej.iblogger.org/72903419231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5fd3bdd0c10fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_5fc96b02e9755.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489042/normal_5ff11a07031e3.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/3dc249e7-2ebf-4b00-9e04-08788f75adb3/jewaxomirifafologafesiko.pdfIn PDF document text
    • http://ruwabegaxiz.epizy.com/90508064973.pdfIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_ca87fed9108149f9af3c103c7d986070.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a172fd-5c21-4642-92cb-5bd8011c6096/gipavorivuka.pdfIn PDF document text
    • http://panurimo.epizy.com/vurulasedojumu.pdfIn PDF document text
    • http://digufelusa.rf.gd/sananexer.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_febfff09a031456ba89d4cb5e9511e33.pdf?index=trueIn PDF document text
    • http://binaraw.epizy.com/1st_3rd_angle_projection.pdfIn PDF document text
    • http://ziwejozaz.epizy.com/epel-_release_for_centos_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9ff385-8921-4a7a-9af9-426c7ed070b8/32925422067.pdfIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_30c7b566dea44f6eaafa60acf2f65b50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/710f28f1-2267-4689-b3df-dbbcb75e99ff/what_are_the_4_main_factors_that_affect_climate.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_off0000db74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB74 5564 bytes
SHA-256: aef07872211583cbe72d81b4af6b818ada671d32d3e4c9fd552b4b68c6084013
font_01_sfnt_off0000ee5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 11132 bytes
SHA-256: 093bc5ba4cb0f5f38937a43b2473a83d5f8f4dd382087438e89cefa2416858f9

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