Malicious PDF — malware analysis report

Static analysis result for SHA-256 4520b1f21bb37a29…

MALICIOUS

PDF

74.7 KB Created: 2021-01-05 00:08:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 43c7834957964064513efc86c5badb78 SHA-1: 1500b57da2e7d1058849bdd5e760ed4318367dfe SHA-256: 4520b1f21bb37a29b9611720d1079761ee207ff991e66eda44e83683e25373db
114 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting an attempt to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to hacking a game, reinforcing the lure. The presence of PRC/3D content is a known technique for embedding malicious content in PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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=how+to+hack+hungry+shark+world+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f875269cd5a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5fe82505524dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a425690-8558-4fa8-834e-3128e787b741/keviditimugafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa4bd72-0021-4e2b-a9ab-0a5ce1ce3c74/89169271888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf51be6-8e0e-49f7-adb2-47b881ae006d/boeing_767-300_united_first_class.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9a5ce8-2264-4ac9-82db-3eb4e12d3145/weather_near_me_map.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/general_chemistry_1_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c6ec8d-24f6-4301-84c3-2dc603e1763d/kunavowazadafeferilesajiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ecea13-cfc7-4f72-9aef-2abcbed63356/ribbon_cutting_scissors_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/bjcp_guidelines_esb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eef42f8-c1d4-4afa-9169-ea2ad0580f7d/livro_letramento_um_tema_em_trs_gneros_magda_soares.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1103903-f87b-4e8b-9885-a3b407dd270d/bear_hibernation_craft_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/aliexpress_4pda_android.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_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 5692 bytes
SHA-256: 173fb956928a6719a2c99606bee827b1cfc78bb1f2b7f61c2748d2f58bc904d5
font_01_sfnt_off0000f6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 11768 bytes
SHA-256: 0b4d403f937707347228115b310d81bdb9c84d6623e50a57cf803fefd2df255b

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