Malicious PDF — malware analysis report

Static analysis result for SHA-256 b579499df9c010c3…

MALICIOUS

PDF

73.2 KB Created: 2020-12-19 01:03:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 52d2e0fd2152dd4b15b71368ccd3fe4c SHA-1: 631f9dabf63abf87600973d348c0410fd7982be9 SHA-256: b579499df9c010c360bcba897edbc883d2b7938a00fb0351cf3efe8aba8ee2a6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site or download further malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit user interaction for malicious purposes.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?utm_term=crude+and+adjusted+odds+ratio+pdf PDF link annotation
    • https://refedekejevejat.weebly.com/uploads/1/3/4/3/134312363/f7276e3a6e82.pdfIn PDF document text
    • https://jibowosiz.weebly.com/uploads/1/3/4/6/134632869/58a1fb62003a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f895fd96597c.pdfIn PDF document text
    • https://mejebepagomuda.weebly.com/uploads/1/3/4/4/134494428/vubapis.pdfIn PDF document text
    • https://lowutifita.weebly.com/uploads/1/3/4/3/134352456/gesogujin-fekubavegolo-tujus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/niporofez/fallen_order_walkthrough_zeffo_tomb_of_miktrull.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/angaraka_ashtothram_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/anatomy_and_physiology_for_nurses_at_a_glance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b1cc7d-1803-4ec5-a390-2530dde390fb/50946192583.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/freelancer_s_guide_crossword.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/atkins_fisicoquimica_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/google_sheet_function_contains.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/kerala_psc_bulletin_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD260 4984 bytes
SHA-256: 2e75c6eeb6b09abc85c9c0432b8485709fa0f36b7e15c822e30f4aba51bfb555
font_01_sfnt_off0000e367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE367 11336 bytes
SHA-256: 01d34fc1f41ef7b6b715fe30cb26791d14c146a7ed6317bead7bf46a75c6c966
font_02_sfnt_off00010a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A37 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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