Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47458cc7a421aec…

MALICIOUS

PDF

91.4 KB Created: 2021-03-17 13:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b8f076c268c04d4f62878b653006c7df SHA-1: c697869d4d6fc434501f4200b2a6335294d2b6b2 SHA-256: f47458cc7a421aecd7ca691f4cad9ebc52eec4e68283309cd7be5a82611d922b
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its nature as a recovery secret or private key lure, aiming to trick users into revealing sensitive information. The document contains numerous embedded URLs, many of which point to link farms on disposable hosting, suggesting a phishing or scam operation. While no scripts were explicitly extracted, the presence of PDF_URI and ML_NYX_PDF_MALICIOUS heuristics indicates malicious intent, likely involving redirection to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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/award?keyword=recognize+text+in+pdf+image PDF link annotation
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/d8456af.pdfIn PDF document text
    • https://metiledozixav.weebly.com/uploads/1/3/1/1/131164016/205f05e50964.pdfIn PDF document text
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/lobitoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_6049b4cc4a4cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487200/normal_5ffa28779a3ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_6012b0bf186c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_604bbe3f259f2.pdfIn PDF document text
    • https://cdn.sqhk.co/mubafazus/o0hJJA6/analyzing_sentence_structure_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456999/normal_6009380f3e169.pdfIn PDF document text
    • http://qrettalq.online/tamopoxideoa4q4.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/oicgdSB/pagibosires.pdfIn PDF document text
    • https://dejoputaxili.weebly.com/uploads/1/3/4/7/134763817/3452506.pdfIn PDF document text
    • http://axecheat6.xyz/apalancamiento_financiero_ejercicios3s796.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/5oiggjf/reina_theme_park_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35241785-c822-4b72-bd3a-fe3397740c78/vb.net_interview_questions_with_answers_for_experienced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6245465-af71-425c-ab08-a03f6702eb2c/audacity_app_for_android_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be1e1cf-9e7b-4e1c-bfe6-76ec20597dbd/47050157532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1119558-3cba-4a65-9371-b5853ac7f557/volurexiruxu.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/rojotojojubevej.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/sejidiniditi.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/california_achievement_test_practice_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/8_healthy_eating_government_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3e602f-0e90-4894-b6a2-14c629bac6f7/wild_bill_elliott_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/optimate_5_instructions.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_off000126af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AF 5292 bytes
SHA-256: 1e755b11bcf3f32235f74a8912b136f0bc4e683a72aca866182820cfe697d1cd
font_01_sfnt_off000138be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BE 11952 bytes
SHA-256: 270f2f821656fd7494f379bf0dadd6041b2b1a5216cea08f33bd1743185f2792