Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1d3c86fe02bf47…

MALICIOUS

PDF

74.4 KB Created: 2021-04-06 13:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 678fcc149eb4579748d50feea63e5054 SHA-1: ffbadb716c3de2ecb84ae38ab8b07f0b941a47b1 SHA-256: ce1d3c86fe02bf47d018c099890fb8e3e655d010f360f8628f0a4b8cf4d88058
96 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dugedepap.ru/award?keyword=adobe+pdf+maker+word+add+in PDF link annotation
    • https://muwirejevom.weebly.com/uploads/1/3/1/8/131857435/1684168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468571/normal_6002aacf7bd12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_606c29319fc24.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/7e16b7acd7573.pdfIn PDF document text
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/mojiz.pdfIn PDF document text
    • https://sotodivejezaze.weebly.com/uploads/1/3/4/3/134391575/mipumisijupa-fugepol-besupiwinod-wivovoki.pdfIn PDF document text
    • https://ranibifuvif.weebly.com/uploads/1/3/1/3/131381542/4403465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411252/normal_60403226895a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://burafidofa.epizy.com/what_is_coming_to_netflix_in_december_2020.pdfIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_aa8091f060ec4e6684b817b833e9fe0d.pdf?index=trueIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_94cadfb56221493dbb8cfce8c3193903.pdf?index=trueIn PDF document text
    • http://lirepemewepe.rf.gd/13446982704.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/26779580391.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/pictograph_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/suramow.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/canon_scanner_lide_110_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/89312715864.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/mivibagaxalubawu.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_off0000e4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BC 5260 bytes
SHA-256: 6cd2b2aae022d44342002aeac83b52b002ce15cf4197c44079298a9fdf8c35a3
font_01_sfnt_off0000f697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF697 11700 bytes
SHA-256: 2b54fb50ac930639f6af55f6ca0bfe2df0ebfb90a06006c5adf3f642fd3057ad

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