Malicious PDF — malware analysis report

Static analysis result for SHA-256 5535aba36671b779…

MALICIOUS

PDF

73.9 KB Created: 2021-03-03 01:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f65075e0438a425af7242527d88e84fd SHA-1: c90ac4ec1fafaab09b9f9082c58a8b0262bcb1d9 SHA-256: 5535aba36671b7795ebb6790ccb07cb029a9425353d62c175c073adf57c82099
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://resalured.ru/wix?keyword=master+lock+reset+tsa007 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5fe6a749a568f.pdfIn PDF document text
    • http://canonsburglake.com/mainstays_l_shaped_desk_with_hutch_instructions9lwbq.pdfIn PDF document text
    • http://streichpack.online/color_shift_spray_paint_near_medihpy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_60107cf44fae7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_5fd09d7d0881d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_600aef645ca41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479237/normal_6033359493a54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480891/normal_6032e4ab357e1.pdfIn PDF document text
    • http://new-volosi.ru/ccna_2_chapter_4_exam_answersjlo15.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/sap_for_dummies_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408993/normal_601c8e2fac00b.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/what_constitutes_a_breach_of_trust_and_confidence.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_60319742f2862.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/regovadeje/eighth_notes_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/sijoravawapagapezezilite.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/lejugoxovifim.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/origine_des_coliformes_totaux_dans_l_eau.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/jlpt_n4_2019_answer.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_off0000e548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 5084 bytes
SHA-256: 1dd5c73ae80d838857074764f02d0341dd8afed64535d08c10d6172685b18de3
font_01_sfnt_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 10636 bytes
SHA-256: 9e9ccc0f42c612d8b6ca1fa38a086b25f377453ea988aa97de5d1b16d6f561fe