Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbc8157f791bee9…

MALICIOUS

PDF

72.7 KB Created: 2020-12-17 15:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 88640f26d3949301c41c8879565fa2e9 SHA-1: d265c5654d740421574c15400377587a2ac1d5e8 SHA-256: 6bbc8157f791bee95022dd38145648d83249bafc1b82ca0c950f3d01ea69684d
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or malware delivery attempt. It contains a link to a known malicious redirector URL, which is designed to lead users to further malicious content. The document body, though partially corrupted, suggests an academic context, likely a lure for a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=ap+language+and+composition+syllabus+2021 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420612/normal_5fb4e9fbe83ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5fbacfae1e8b6.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/xutomoxu/up_b._ed_application_form_date.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17dd3405d5340f32dc63c/t/5fc425c808845d09240c699f/1606690250670/80091244919.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/towerobosawituxuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caaa9ec8-b13d-4163-9c49-810f15674d0d/salvador_dali_elephant_swan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4327fa-67c5-4629-9f19-5d655e201015/wood_cutting_machine_price.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/how_to_refresh_gridview_adapter_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/dative_covalent_bond_chemguide.pdfIn PDF document text
    • https://s3.amazonaws.com/zukukelejurotef/jordan_peterson_wife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f01c6dec-208d-4872-b73f-f26db269d1db/63868939702.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/xotiwifeperimulugari.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_off0000ddee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEE 5852 bytes
SHA-256: cc766e8d786bb4ba41f8f08717a57728db3e7eac6fb07b6edfb5536861dc34ca
font_01_sfnt_off0000f1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 10568 bytes
SHA-256: a245be902a47255703900b10041782fa68888cb4fbb48c50683589924839fd72

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