Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7354572b5412481…

MALICIOUS

PDF

48.9 KB Created: 2020-10-25 23:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ebf700c188f75e788c0522bf05a12181 SHA-1: de6ea1e91127cd62c2ad4252f46affb51ad3b705 SHA-256: c7354572b541248105b1dde89056b8e336310f8762e8cd7b0dc85cdf6f051e3d
94 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 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 1.0000

Heuristics 3

  • 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://cctraff.ru/aws?keyword=william+burroughs+poems+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_5f95dc81438a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8a9d29baddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8a5e886c09b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f8de5c8f004b.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/xifabilejilab/20734028061.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/vapewetatuwexejimetapexuf.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/calligraphy_cursive_alphabet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a81904-1816-42b5-bf2e-66f76298a420/723338719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fae9474-5176-4e47-9144-9ccc422089b6/25475189853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/989df2e1-732c-4d61-98c2-910e3adb5cb0/xepofon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193823f3-5103-46ba-afb4-1719b59d1b63/69447164813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d1d7cb-17e1-4ffa-8599-cc6186dbe122/39868188810.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/asme_b31_3_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/ncert_11_biology_book_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/bovisorutefetufusepuna.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/fisilojizufaxuxel.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/a_b_simpson_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/35434123047.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/tripura_map.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_off00007ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA6 5608 bytes
SHA-256: 3a0fc1de41e701374134f07ed6f53e1cde14644b6da7e14a1e112fd613c17fbd
font_01_sfnt_off00008f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F95 11680 bytes
SHA-256: 852a671a95ba1006e1a7f274bce32c2bcdd843a62328b2c6a6807b83dcbeb95b

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