Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71d483c501e1154…

MALICIOUS

PDF

175.6 KB Created: 2021-03-17 03:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7bbf0f56171c97939cf5e875964cebbd SHA-1: cde30135ec2143106e8997592deb53de88f29de1 SHA-256: e71d483c501e1154522c1dbe80d84df7699d9fa47af86bdc99d11c61fbaad383
392 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution T1555 Credentials from Password Stores T1027 Obfuscated Files or Information

This PDF contains embedded JavaScript and links to known malicious redirector infrastructure, indicating an attempt to exploit vulnerabilities or lure the user to malicious sites. The document body heuristics strongly suggest a social engineering attack, instructing the user to disable security software and provide sensitive recovery secrets or private keys. This combination points to a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 11

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dafemum.ru/123?utm_term=arcsight+esm+7.+0+installation+guide In PDF document text
    • http://vizit.store/18231236194d62m9.pdfIn PDF document text
    • https://zawanudodulir.weebly.com/uploads/1/3/1/4/131452903/zuvaso_sipobebudama_funukozilimina_wutukazufarema.pdfIn PDF document text
    • https://zadejafiton.weebly.com/uploads/1/3/0/8/130813032/6866000.pdfIn PDF document text
    • https://fekawuzode.weebly.com/uploads/1/3/5/9/135993312/memalewet.pdfIn PDF document text
    • http://bufo.online/firehouse_subs_nutrition_factshuwin.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/206662bf.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/MhfvigY/kepad.pdfIn PDF document text
    • https://tafejopaz.weebly.com/uploads/1/3/4/0/134012310/xodakarodivuwoxeda.pdfIn PDF document text
    • http://dutov.org/advanced_english_grammar_tenses_exercises_with_answerszjmbq.pdfIn PDF document text
    • https://cdn.sqhk.co/tunaluvum/auhn2Y5/fear_the_walking_dead_season_5_full_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/ifxiaja/basketball_world_rankings.pdfIn PDF document text
    • http://sale20.site/heat_n_glo_6000tr_parts_list3x7d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a12eaac8-c3ea-4553-a4ea-9ef887fac34e/zuvapegezubasonapanibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4f4a192-883a-417d-bf99-72e9ff4ce8f6/4375551539.pdfIn PDF document text
    • http://wosolebaxuwutux.rf.gd/45943162422.pdfIn PDF document text
    • http://bopuxenuxesozu.rf.gd/pumpkin_printable_coloring_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218f5abd-7e65-4c36-b99f-fdc6f9f40bb2/69803828613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a24d46-620b-4a80-a3fe-8d9c0e9fd9e7/nazagagizu.pdfIn PDF document text
    • http://fezadup.rf.gd/3_column_layout_css_template.pdfIn PDF document text
    • http://fegugeg.rf.gd/small_business_accounts_spreadsheet_template_free_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b0c325-8971-40d2-a054-82c046f6ac8c/52059789504.pdfIn PDF document text
    • http://jirufemen.epizy.com/wisorenesuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002642d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2642D 5476 bytes
SHA-256: b36d10cad94bf35bce8bb6b2cc618a25329e3ccf8b60060bc1e22fba31269b90
font_01_sfnt_off000276a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x276A4 12760 bytes
SHA-256: 611e62d3303f24baef1d2ebdead898f0a84cdaf5c2653f9691a457857344b524
font_02_sfnt_off0002a22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A22A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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