Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab79d6e6253ae0fe…

MALICIOUS

PDF

61.7 KB Created: 2020-12-18 03:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a0f8050ae0fac15b62650ec83b7a1504 SHA-1: dfccff15d8cef7a9d14258be70074fb3b1af33bb SHA-256: ab79d6e6253ae0fec76a0c418e1ca25630c48de60587e9b7c31238098a9fe714
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://ggtraff.ru/aws?utm_term=sheets+of+paper+per+stamp In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448750/normal_5fb363765f1f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5f8eded2be8ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_5fca82e9c4392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5fd64735f2977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5f94578693598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f9c584f69a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489732/normal_5fba000b5379c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485705/normal_5fc5f03f4bb5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5fba09467981e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f874ad1cde5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5fb5a088440ee.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/e2df037b-4236-43aa-a74c-efeca2a54ebf/sojag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894e0336-fcb2-4ac4-8726-5c4dcf44a3c2/ramadunajajinemili.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_off0000b7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FC 5212 bytes
SHA-256: 4f5fc369e12a324b9cab8e02717a83adb613c20c9890d4cc1f67e76e48e89f0d
font_01_sfnt_off0000c989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC989 9620 bytes
SHA-256: 79f5e5aca6ddc83fdcb04f97ae7cfae01bab3b408e310c6c9cc26c8ede0cf4ec

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