Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd41e84dcb695f9d…

MALICIOUS

PDF

71.7 KB Created: 2020-12-23 08:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53fa65bd4e0136b8ddba9a069879675b SHA-1: d284e8b63e5b63ebfde49a590819852448f309bc SHA-256: bd41e84dcb695f9d77b2aa970e8f7820d466cbe9d3cb8ba2f845c71bd5a3ff58
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://ggtraff.ru/strik?utm_term=my+anime+girl+haku+mod+apk'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=my+anime+girl+haku+mod+apk
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5fa07d6d3a53a.pdf
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5fbd4f83d9c12.pdf
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5f8edbeaacfe9.pdf
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5f93419627779.pdf
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5fdc548bb925f.pdf
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5f8d1ce370077.pdf
    • https://static.s123-cdn-static.com/uploads/4368221/normal_5fcba04e30d82.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ae5a42bc-ef4c-46d2-a7b6-2df7e6c6b195/4513411915.pdf
    • https://static1.squarespace.com/static/5fc10fb5bda9c57a97bf17be/t/5fc173a3173fb5383bd99a19/1606513573646/93751396314.pdf
    • https://uploads.strikinglycdn.com/files/e9e6ef95-ccfc-4b14-b306-e74952ad1ce2/dopapol.pdf
    • https://uploads.strikinglycdn.com/files/ed63c197-f95b-423c-9b1b-a94ad487d52a/mil_hdbk_454.pdf
    • https://uploads.strikinglycdn.com/files/d0a79018-982b-4003-a294-63cf76272688/pokemon_ash_gray_download.pdf
    • https://uploads.strikinglycdn.com/files/83ed15cf-98fd-4ab3-b64f-f81983a1381a/46393922942.pdf
    • https://uploads.strikinglycdn.com/files/ddd52f6d-d231-41ae-8b97-bb05b1e9a248/2460111118.pdf
    • https://uploads.strikinglycdn.com/files/9ae2f3ca-dd06-49be-8fa3-bcb42a38c0fb/41895080136.pdf
    • https://static1.squarespace.com/static/5fe2724da1ba3312ffe74300/t/5fe2c1a3d3fa4e0286e824db/1608696230861/avery_label_tent_card_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c373.bin
2fabd58a0164b112879f93e97377d0f891b26e1080cf48794686672e8b47611c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC373 5168 bytes
font_01_sfnt_off0000d4cb.bin
9794ae82fcbb7c4ce6d0719d3dcf72b01ea059bd33f6582c79ca15f803bf1e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CB 14568 bytes
font_02_sfnt_off00010255.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10255 4324 bytes

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