Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2248d09c01b9be…

MALICIOUS

PDF

73.3 KB Created: 2020-12-16 20:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 867aa86f7be183ebfd651edccecbacdc SHA-1: e9c651dc65a4a6923ca943f3bdc21bf3d155a9d2 SHA-256: 3b2248d09c01b9befbf60015bd8002349d16d758ff39c1d630759a91199e88ae
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://gettraff.ru/123?utm_term=action+romance+anime+where+they+get+together'. ML classification and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, appears to contain metadata related to the URL, suggesting an attempt to lure the user to the malicious site.

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://gettraff.ru/123?utm_term=action+romance+anime+where+they+get+together In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444643/normal_5f9d16067e653.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497348/normal_5fcd61b9837dc.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/dazutun/android_games_temple_run_3_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a32f54d69c596236ac72/t/5fc7d32e71235964e0c274ad/1606931247965/hero_evolution_sp.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/25416369938.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14b808139af037647f366/t/5fcb49d21415195da08334bb/1607158226948/86517575525.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc080f7bf71053ccb0e3c67/t/5fc20266bc819f1cf41f5ffd/1606550126498/99250414958.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6b83dfdd95b60d5131d/t/5fc3ca724f9837572053b947/1606666867615/43861669694.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2aa3cede603bc87554fc/1606232739521/zajenevagewosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c573bc6-da5e-4b92-85bc-76a206b74d0b/51424138654.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1425117e7202640ec9856/t/5fceeb1b7379aa35976a884e/1607396124067/5829698405.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2465790d063a90a930d6/t/5fd1afd59a9e5443ac78b40b/1607577557229/first_electric_coop_jacksonville_ar_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/dagejuferomos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf551b9d79364840851202/1606374717895/devudiwibesomuw.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_off0000e23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23F 5188 bytes
SHA-256: 94f2070d1bd733c576699e23706a0fa1b7c69432264046477553a1ddf29f745b
font_01_sfnt_off0000f3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D4 10640 bytes
SHA-256: f19118e2ae0910d4c2657c72d76ef4654c488aa23f2763161d4f8edcb02afd46

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