Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8fdfea3e67bc7a…

MALICIOUS

PDF

77.4 KB Created: 2021-01-15 07:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8066c4a6a45c530e7d8811f310054a78 SHA-1: 76b0dbf63ab2f552170e07cbb40b34308f1ed433 SHA-256: 5d8fdfea3e67bc7a119dbf269cf2f3c10c4cab66c92be35e7b787ec138cb4ca0
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://gettraff.ru/aws?utm_term=alternity+warships+pdf'. This URL is likely used to lure victims to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan-d2528dad23a95d95-10044376-0'. The document body is heavily obfuscated and unreadable, but the presence of embedded URLs and the specific heuristic firings strongly indicate a phishing or malware delivery attempt.

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/aws?utm_term=alternity+warships+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4388173/normal_5fc52ec212121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461761/normal_5fe608de8622e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476756/normal_5fd9573e7219c.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/cE8ijgc/play_free_online_games_earn_to_die_2012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_5fa901ee4bcea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_5fc04d4f9a14b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5f92642087fdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_5fa98f741ce2c.pdfIn PDF document text
    • https://cdn.sqhk.co/kunagukojoxu/ibRjd0K/schema_electrique_interrupteur.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/belopudevuzuza/30170198424.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/lopetalubotekekajuraf.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/dead_silence_full_movie_english_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/act_2_romeo_and_juliet.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/terminator_4_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/deployment_process_map_template.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_off0000f011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF011 5312 bytes
SHA-256: cd4cf4e32093eda71d8ad0f06376f97ac12a0b92cd83c11c34aa65d1c411bdac
font_01_sfnt_off00010235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10235 11364 bytes
SHA-256: 92f4c45853704884655f33db1e718eca87577bfcab44c2855108769b1de9fe44

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