Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a134c8864c5394b…

MALICIOUS

PDF

80.3 KB Created: 2020-11-13 01:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0c5470e5ae845f0b1207c46bc323faa8 SHA-1: 15815df5a17f97deeb134615a56fe1f543d7e1df SHA-256: 2a134c8864c5394b569b5eab67296ff789c1d56500da79069b6e0c30fdfc69e7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/strik?utm_term=medical+apartheid+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f8f516e7f5c7.pdfIn PDF document text
    • https://kololeranazi.weebly.com/uploads/1/3/4/5/134583506/kaxifofe.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/kopamez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f8d5668e575c.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/sasufufa/40494279832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cdaf009-4afa-4514-9cd6-5f3c5aa27361/62818830934.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/words_with_zav.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/votusol.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/fur_elise_piano_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06062c7-61df-46f6-b6c2-69a5671b363e/pathfinder_dragon_style_vs_jabbing_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26db636e-79e1-4d1a-bea6-2fc4008cb3f8/download_prince_of_persia_warrior_within_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/jiribug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06bb3794-863b-4960-ad57-221bf683bfca/dutegokubeluwopopofator.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/asthma_causes_symptoms_and_treatment.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_off00010107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10107 5140 bytes
SHA-256: e0c003be2b2822ad827a1c6f8b216211c92063defa899802016d4574d8ffc695
font_01_sfnt_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 9980 bytes
SHA-256: 88e50bee96b7f97e5c90d8376fe5433fa367ee06986072849ef2f2143769a34b

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