Malicious PDF — malware analysis report

Static analysis result for SHA-256 67647874bfa055f6…

MALICIOUS

PDF

76.4 KB Created: 2021-02-14 16:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: af1de41cecdfcd8e3f313292e02645d0 SHA-1: 4becb8379a73999f3992c64ff60c9c8ac9878cff SHA-256: 67647874bfa055f627a4bb630ed6a3021e924405294c11c3ab621e06a7ee47bc
154 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link to a known malicious redirector, https://crophysi.ru/aws?utm_term=accelerator+manager+for+windows+7, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to "Accelerator manager for windows 7". No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/aws?utm_term=accelerator+manager+for+windows+7 In PDF document text
    • http://lazadacostumercenter.com/415193120875syc8.pdfIn PDF document text
    • http://future-techno.ru/7930952737ad44e.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/M8VgjJr/kingdom_destiny_2_rise_of_warlords.pdfIn PDF document text
    • https://cdn.sqhk.co/lajojeletab/ignjaja/sadotidomunidejig.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/YgdhjgR/73190118945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_60172b0e912bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_601a48621a941.pdfIn PDF document text
    • https://cdn.sqhk.co/zevukodixu/f9hchjS/ice_cream_sandwich_youtube_face.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491934/normal_601ccdfa8a816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_602883514024e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494669/normal_5ff9d220bc3b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_6012189420425.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/pAOtgh3/hungry_shark_world_map_pacific_islands.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/jjxE3gc/sugizi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471475/normal_5ff4b5b843850.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5fd065ba8deda.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/Qhcgdhi/xowud.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/juliziwojatige/business_law_syllabus.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_off0000ecd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD6 5500 bytes
SHA-256: 07d7db8a60678f7528e1e63afe46b554cfd238f7422fbbdeab4919330c02d657
font_01_sfnt_off0000ff90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF90 11128 bytes
SHA-256: 73803bd7b4b17399d7dd6aa4968890cbcda359287010fec6f342036cd2b40d4d

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