Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a3646cd6390ae68…

MALICIOUS

PDF

75.2 KB Created: 2021-03-04 00:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4c5ba4397c154b7d7ec507e6619a0691 SHA-1: 9a0facd409f226881a9d51bbef07427db6205d78 SHA-256: 9a3646cd6390ae68e2aa1ab94e348ced633972f489fb4cd8c877d1cf004ee8f4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/123?utm_term=the+magic+mountain+summary PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410447/normal_5ffc2b141729a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5fd60ba392d8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5fee2051ded66.pdfIn PDF document text
    • https://cdn.sqhk.co/luvunugoz/kjijdia/14177577181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_601eaa4dcfc7f.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/best_soccer_coaching_apps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_601cf8e2a0b71.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
    • http://pazepoxi.atwebpages.com/43032148651.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/gekagisope.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/3480656144.pdfIn PDF document text
    • http://teluroluxeterez.myartsonline.com/luwamirawo.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/82295428075.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/line_rangers_treasure_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/50915795235.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_off0000dc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6A 5112 bytes
SHA-256: 5c8aa1ad3eaa0d0446983765896e5e2c4970eaf6591218e2c2da4f277906f992
font_01_sfnt_off0000eda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA9 10612 bytes
SHA-256: 8c8545eb2fd4330ab26a844dd00dc2004dc829c9f8f0aef618bdaca800562a66
font_02_sfnt_off000111c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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