Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71e68559ce1a338…

MALICIOUS

PDF

74.2 KB Created: 2021-02-14 12:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ec04c89f50603a94d8a89cd9f89a3a11 SHA-1: 34b8c09b6d8d6bab1a57a698aa5f4c93730510a4 SHA-256: e71e68559ce1a33815f4e556c4e118ce651316cef085b9e2d20dc25f3a67f49c
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=showbox+apk+mirror PDF link annotation
    • http://lnstagramcopyrightcenter.com/toyota_corolla_2014_review_consumer_reportss7uah.pdfIn PDF document text
    • http://weraka.online/formal_letter_format_for_scholarship_applicationxwf1s.pdfIn PDF document text
    • http://dapodulasopo.iblogger.org/misunodavetezuj.pdfIn PDF document text
    • http://wugulisagu.iblogger.org/14459945974.pdfIn PDF document text
    • http://flymoney.net/classification_des_animaux_cycle_3_trace_critej8re7.pdfIn PDF document text
    • http://robertferrell.net/kablo_kesiti_hesaplama_formC3BClC3BCvgfbi.pdfIn PDF document text
    • http://zemavavidebades.22web.org/73468145003.pdfIn PDF document text
    • http://dixunawizodel.iblogger.org/br_ambedkar_books_in_marathi.pdfIn PDF document text
    • http://denizan.com/how_to_create_stunning_digital_photo3vrjf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/challan_format_in_word_free.pdfIn PDF document text
    • http://fulatunufesaze.epizy.com/balance_sheet_reconciliation_definition.pdfIn PDF document text
    • http://nopasemetefut.epizy.com/28345125106.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/7678027355.pdfIn PDF document text
    • http://jiporiri.rf.gd/20254565839.pdfIn PDF document text
    • http://girupesoja.rf.gd/zapekenosud.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/toxonetelutajedu.pdfIn PDF document text
    • http://gukasitaxe.epizy.com/luzaregan.pdfIn PDF document text
    • http://wimifus.rf.gd/kevezo.pdfIn PDF document text
    • http://zonizuziguzapi.rf.gd/zolimewo.pdfIn PDF document text
    • http://gajedimigifupet.epizy.com/31518671837.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/halving_worksheets_ks1.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_off0000e626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 5316 bytes
SHA-256: 6ff6fac9e713296ebd6d0ee17fc1cf99d10c3260e5acc629cc09d39ce0fd5a52
font_01_sfnt_off0000f824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 10568 bytes
SHA-256: ce51a83d91a09ea9f5c1fde7f0fb9279138333bba94a59d38fb25242efe8ae83