Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d02d44526fe52a4…

MALICIOUS

PDF

75.7 KB Created: 2021-02-18 01:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9a0e4457e054b1b30b68f854cca6c431 SHA-1: 69744a77e76e242ab988f0d4e02d9032fc6075f0 SHA-256: 0d02d44526fe52a41ca2aa05abbeca3baa5c6c4af8ba3ba296f4ea213c2a8d9b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector for phishing or malware distribution. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure for a game hack, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=war+commander+rogue+assault+hack+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4464302/normal_5fdac91d8cd94.pdfIn PDF document text
    • http://bogavevi.22web.org/fojobatogi.pdfIn PDF document text
    • https://zodukaveg.weebly.com/uploads/1/3/5/3/135345947/wuzomifepunewib-sivozojilav-xapoze-noxosorini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_5fcc93bd3cead.pdfIn PDF document text
    • https://navikeput.weebly.com/uploads/1/3/4/7/134755574/5107273.pdfIn PDF document text
    • https://jimekomu.weebly.com/uploads/1/3/1/4/131453536/eb4b7e16818b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_5fd182a1939f2.pdfIn PDF document text
    • http://astropsychology.website/bubble_shooter_classic_mod_downloadhgpvk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489409/normal_602498da36c0e.pdfIn PDF document text
    • http://pixenevalir.22web.org/guided_reading_activity_6-_1_why_save.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/jasadavebaga/66931234549.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/50439638429.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/zebavubu.pdfIn PDF document text
    • http://vakutasuv.epizy.com/nil_admirari_no_tenbin_game_english.pdfIn PDF document text
    • http://gerekuvuburase.epizy.com/spanish_greetings_worksheet_ks2.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_off0000d70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70E 5764 bytes
SHA-256: 5000129f16ddb5e9c0c3eb77365d981ef2f5c5db48d7e5e76404867f849c71c5
font_01_sfnt_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 5704 bytes
SHA-256: 1783a6f8b4fbfefa7e5e16be2383e2981fcb4161cf69587a34669d64c7c0d3b7
font_02_sfnt_off0000fe4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4C 10288 bytes
SHA-256: a7d08a306ce0e89f2026b080b197b180de27f54b8844b8e2c02e0bd9923451cb

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