Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0fdaef2f777830…

MALICIOUS

PDF

83.5 KB Created: 2020-11-06 16:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4b5d762ab0d05ed3c30972c9167365d9 SHA-1: dd2e32032378a8d19597305d2e36aee66fd2b026 SHA-256: cd0fdaef2f777830f2b064c53b8883b31b9c701f986e2e739ce8135b5f34dcf1
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 1.0000

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://traffking.ru/aws?keyword=tok+essay+titles+2020 PDF link annotation
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/gafasadigujudu_fiwodedare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_5f96619b8d2f8.pdfIn PDF document text
    • https://jopojikifereter.weebly.com/uploads/1/3/4/5/134519769/sumew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_5fa07b2a1d267.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/niwujedaxaluzi-joturoroz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/3567807145.pdfIn PDF document text
    • https://losorul.files.wordpress.com/2020/11/76295982183.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/one_troy_ounce_.999_fine_silver_buffalo_coin.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/92623830566.pdfIn PDF document text
    • https://tobaluli.files.wordpress.com/2020/11/95555303623.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/law_school_personal_statement_length_reddit.pdfIn PDF document text
    • https://xojomome.files.wordpress.com/2020/11/nexube.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/misaxozovovemusajuduf.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/zuruberelexagezufo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 4656 bytes
SHA-256: 434d403e31ec973d732edc7edc093ae36db9d22b45c3f37a46d4305b299967cd
font_01_sfnt_off00010e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6C 10872 bytes
SHA-256: 99690238dd146caf97b890c5d5e11064e5034aa6061279caa601e893b69bb5ab
font_02_sfnt_off00013310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13310 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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