Malicious PDF — malware analysis report

Static analysis result for SHA-256 119f04d47be740c3…

MALICIOUS

PDF

68.2 KB Created: 2020-12-10 14:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fb5e7df51f2119aebb7808c43f19ccea SHA-1: b9021281c32dc8a69e4a9d645edca2abeb3f37ff SHA-256: 119f04d47be740c3ad7d0e012d79568c10bd18b962cc6d67a2ecdaa5837a0ed6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=free+printable+combining+like+terms+worksheets'. This URL is likely used to lure victims to a malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/aws?utm_term=free+printable+combining+like+terms+worksheets In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/xuzunokajasorojuwir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55163d49dd124475193a8/t/5fcb3f3466ddd570b0f24bb3/1607155509641/613857663.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29d8640f1034a5cb3e639/t/5fcff7f9055cc35c686ac661/1607464954933/bunub.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29575be9b693951158987/t/5fc3d14218e72e5fdb4cb519/1606668611529/manual_innova_alt_20.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1308d1c8c74131433af20/t/5fd198d08ba64b78df50b7ef/1607571664619/medical_history_quiz_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7207e305-b6b5-48e2-b199-53143f3e3c74/59539388452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253229b7-0170-450f-8551-57760608dfcd/6151883538.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1308d1c8c74131433af20/t/5fd196e7b0f0f842d7a0f26d/1607571175707/rise_of_kingdoms_wiki_castle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c888ac75-c947-4985-9370-17a2431d0457/51654133296.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/vebezufo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b3e09955c744b55c34f9/t/5fc6f4924f9413233b146477/1606874259453/pedakazenijos.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_off0000cbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD6 5600 bytes
SHA-256: bc28af1a556983d05912efab080fa8a7ede3f6741debedb685262389e302de5a
font_01_sfnt_off0000dec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC4 10964 bytes
SHA-256: 89d8395870ed608dd2edfe3549dc6dba3ae4f3747d5ffacde6311b96c68e5c87

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