Malicious PDF — malware analysis report

Static analysis result for SHA-256 4102a76aaa35c5ec…

MALICIOUS

PDF

42.3 KB Created: 2020-10-29 20:15:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 07a823384c626245a9ec538cae864c84 SHA-1: d2eb881d9ca1eee242fb72f960a46f55322f2304 SHA-256: 4102a76aaa35c5ecd78245633bb9784a60e5751f171d3d1c87819c9eb4f317c7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 1.0000

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jewuvasoseximu.weebly.com/uploads/1/3/4/3/134355154/wajevimujaj_tejuvuvugosesu_mawonakuk_rumajatuwumave.pdf.
  • 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://ttraff.club/123?keyword=bill+of+sale+utah+form In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f895ecfb2d7f.pdfIn PDF document text
    • https://jewuvasoseximu.weebly.com/uploads/1/3/4/3/134355154/wajevimujaj_tejuvuvugosesu_mawonakuk_rumajatuwumave.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/6d475.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/julaxel/dead_mans_volley_breath_of_the_wild.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/infeksi_pada_bayi_baru_lahir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be350e5-80f2-4c9e-a2c9-641b2c44c5a3/sigabevaresokujiveredif.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/althusser_ideology_and_ideological_state_apparatuses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2444/8186/files/dipugari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cec0ca-dbb6-46fe-8198-6bb9a77a0d01/pofisivosewujobagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27518e9-b508-4374-ae8f-682f2d3056cd/29697609266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd979605-e50d-4485-af9e-4bda769583a2/vuzagipasezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2963959-605a-4844-97cf-eb3c5690b833/89038886211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4660/0341/files/16738830839.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_off000066a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A5 5056 bytes
SHA-256: fcf2dd30d808236ebbd87893851231e1e018cc8f8637ed34f2d927e6917d24dc
font_01_sfnt_off000077ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77AE 10832 bytes
SHA-256: 6069c2aa3e67ddaf854d4ea49d2fc74353b917fcf753289009c9e11b40f963d0

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