Malicious PDF — malware analysis report

Static analysis result for SHA-256 e537466116929f7f…

MALICIOUS

PDF

77.7 KB Created: 2021-01-16 00:25:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d547059e23fd194cc1539860c313f825 SHA-1: d1cdf0d7cdc3bb762cb48a15e9b941c071cf9b23 SHA-256: e537466116929f7fa552fb230f387c17832c5b99093b9b43ca502651cd06df42
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL point towards a phishing lure disguised as information about data collection techniques.

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://gettraff.ru/123?utm_term=tecnicas+de+recoleccion+de+informacion In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f97808543fb5.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/ib4iiib/easy_toy_patterns_to_sew.pdfIn PDF document text
    • https://site-1200692.mozfiles.com/files/1200692/basic_grammar_exercises_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423431/normal_5fb2a304abae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496378/normal_5fb296b4f1cf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_5fa00761be10a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5fd79e0ca5404.pdfIn PDF document text
    • https://cdn.sqhk.co/suvezadamut/eNjhpij/borutawikop.pdfIn PDF document text
    • https://site-1180277.mozfiles.com/files/1180277/piano_with_pad_band_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/agW1gdj/jolulopatofejufizib.pdfIn PDF document text
    • https://site-1172118.mozfiles.com/files/1172118/84421259285.pdfIn PDF document text
    • https://site-1176402.mozfiles.com/files/1176402/materi_belajar_bahasa_jepang.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482402/normal_5fb2ee2d26b12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387229/normal_5ff918e2e8184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23E 5116 bytes
SHA-256: 463ecdd969416ec250c09526a0182cc76d1cb42945063397f1d2b72b25a042a2
font_01_sfnt_off0001038d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 11260 bytes
SHA-256: 052c50ad3fadcca87171d060be975ced652d47dec0a3ff8c79617ce3c3d31f4e

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