Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd44def6c7def498…

MALICIOUS

PDF

86.6 KB Created: 2021-04-08 00:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 7897570f1442697d08e028652715db58 SHA-1: e49ca4f5be71170dba269fda02b1b77e5e13909c SHA-256: bd44def6c7def4988165fa8d8e22a42c4dd0f7eb071a666b8ce39fa29a96abb0
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to reference a 'disaster recovery testing checklist template', a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/123?utm_term=disaster+recovery+testing+checklist+template PDF link annotation
    • http://tudanopebula.iblogger.org/narrative_essay_outline_template.pdfIn PDF document text
    • http://jinowibiko.iblogger.org/3359827628.pdfIn PDF document text
    • http://ruwulabosubev.iblogger.org/atomic_theory_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/bjjtJOi/papolaxatixapokekopoxub.pdfIn PDF document text
    • http://fitixezuveseli.22web.org/42830096840.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/tgcichh/parchisi_star_online_gameberry_labs.pdfIn PDF document text
    • http://zageketukux.iblogger.org/easy_way_to_understand_math_word_problems.pdfIn PDF document text
    • http://mizarofu.22web.org/4195322195.pdfIn PDF document text
    • http://fapumew.22web.org/49756226564.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/atJ5YnE/classcraft_student_code_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/aggsici/planetary_annihilation_legion_galactic_war.pdfIn PDF document text
    • http://nelawetazabuta.66ghz.com/template_dashboard_bootstrap_angular.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/dgggigf/provisions_of_the_articles_of_confederation_worksheet.pdfIn PDF document text
    • http://bomisedoxu.mywebcommunity.org/wotisagib.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/23343099425.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/lefemijip/9739328890.pdfIn PDF document text
    • http://wegoxoxajenugol.rf.gd/pre_calculus_grade_11_stem.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/como_citar_bibliografia_vancouver.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/tazijezuzunarowebexomo.pdfIn PDF document text
    • http://xusixuxoribixe.rf.gd/gumanutuw.pdfIn PDF document text
    • http://susugafof.epizy.com/balance_sheet_accounts_reconciliation_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/gotv_antenna_installation_guide.pdfIn PDF document text
    • http://gutazerabudapa.epizy.com/52043099544.pdfIn PDF document text
    • http://bavufupuvamopaf.atwebpages.com/estados_financieros_auditados.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/93256699654.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_off00011357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11357 5572 bytes
SHA-256: b56e6cf73ba380d2f0d52e3eb7a2002cc2a70ba8fdbc11522e842c0b4e016730
font_01_sfnt_off00012636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12636 10684 bytes
SHA-256: b2e88d78577b9f761690d5f0ebda58ecba0932e68d2ea4e4439ea0bd4f0870e8

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