Malicious PDF — malware analysis report

Static analysis result for SHA-256 471597b2ebd4c83e…

MALICIOUS

PDF

256.8 KB Created: 2020-11-06 06:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5688f02813fc27efb05180de1b55966c SHA-1: d5fb5774a3b0913016039dc77461c700c777f76e SHA-256: 471597b2ebd4c83ef27bbca8c5742c62433481fdc694533ba6d25d13a00162b0
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 0.9985

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://ggtraff.ru/123?keyword=ftb+blood+magic+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5f8c04707dc39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_5f8a03b603905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f926ed071b4f.pdfIn PDF document text
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/023710b61d.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/1bcd6de6.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/labit.pdfIn PDF document text
    • https://wesodopudo.weebly.com/uploads/1/3/4/2/134234684/tuvizuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5fa471150bcf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5f97df3871a99.pdfIn PDF document text
    • https://togurekeve.weebly.com/uploads/1/3/4/0/134040335/7199960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5f9238c4d58f3.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/e83f1f39-bdb3-4d09-b858-4c394b990249/a10c_dcs_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10759e07-bc11-49b5-814a-d8dfdd3e5412/59510809707.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off0003bfb3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3BFB3 30840 bytes
SHA-256: b1ca848c11fa5e70348b80dcf43d2606da82b03a067244769a47d440106c3253
font_00_sfnt_off0003863b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3863B 5080 bytes
SHA-256: 5aa60151253dcacc08dadda51d1277af9d5432d23c5dce8d7b4970a7c214492a
font_01_sfnt_off00039771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39771 11752 bytes
SHA-256: c6e62724b843c48d854ae23bf98336f94958fe31d25bf0116e36f1d87d2c9e4b

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