Malicious PDF — malware analysis report

Static analysis result for SHA-256 488af9aad77eedb2…

MALICIOUS

PDF

74.3 KB Created: 2021-04-24 08:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b13ade4a230af466498b2628ffef9f94 SHA-1: 1223d5d3ccb3e67bd0747e3eb6fc408b327e8eb7 SHA-256: 488af9aad77eedb25fdde7dfd289173ffaca108ae15d9767fca1efa08115b4da
186 Risk Score

Malware Insights

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

The sample is identified as a credential phishing lure, specifically impersonating PayPal. It contains multiple external URIs, with one directly linked to a credential phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to steal user credentials via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/9167404.pdf.
  • 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://soxebez.ru/strik?utm_term=xbox+live+sign+in+error+8015d000 PDF link annotation
    • http://tonukavugu.mygamesonline.org/wijixebavatepigaxoli.pdfIn PDF document text
    • http://safetymirrors.xyz/fcc_part_95_rules9exb0.pdfIn PDF document text
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/9167404.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/43486057685ahrk7.pdfIn PDF document text
    • http://tofuvuniz.iblogger.org/pevukupumebaravotunubet.pdfIn PDF document text
    • http://verification-help.business/9411157732accey.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/how_to_get_free_rp_lol_2019.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/zugurab.pdfIn PDF document text
    • https://duwutevo.weebly.com/uploads/1/3/4/5/134597351/wiledijonafuji-zokotiwewedoniw.pdfIn PDF document text
    • https://furamakivagoj.weebly.com/uploads/1/3/0/8/130814247/depawa.pdfIn PDF document text
    • http://jakartapro.xyz/bizipanatodefogi48gxs.pdfIn PDF document text
    • http://regvoolkim.website/zitifevexidjdqvg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_33a9013f82194468b219ef9677e220d4.pdf?index=trueIn PDF document text
    • http://pubupamosala.epizy.com/gyro_chimera_ant_form.pdfIn PDF document text
    • http://naxadib.rf.gd/cfdi_3._3_2020.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_57ed44fc2d71451aa00bc009258c235c.pdf?index=trueIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_e658f266b5044d6fb11662b69992d070.pdf?index=trueIn PDF document text
    • http://guvubaxi.epizy.com/jitudat.pdfIn PDF document text
    • http://zugagib.atwebpages.com/west_bengal_state_university_bengali_general_syllabus.pdfIn PDF document text
    • http://dabogubomukifu.rf.gd/22211412422.pdfIn PDF document text
    • http://ketanuviz.epizy.com/65439492567.pdfIn PDF document text
    • http://kuxiguzemafuj.rf.gd/example_of_appendices_in_report.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_off0000e3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FB 5540 bytes
SHA-256: fcfc2010b6e6e176382191e535de33f4e0dfce563599902bfd54df5a8877e979
font_01_sfnt_off0000f6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F2 11408 bytes
SHA-256: fa8381ee6960b33803e5dab9ecafa45485789ec2a8e964bedcc30d71ac994b08

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