Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e164ae8f43ff364…

MALICIOUS

PDF

40.3 KB Created: 2020-06-10 14:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: ad188f31062a2ffe93a977f76b91b3af SHA-1: 55a67933d113ac5d95aac940c794eed3aec116a9 SHA-256: 2e164ae8f43ff364155cda7901d5f191c2cabdcbcfe35c731267bf3246a833fd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to similarly structured URLs on different domains, indicating a link farm or redirection scheme. The primary heuristic identified this as a 'PDF_SEO_LINK_FARM' and noted a mass of external PDF links. The document body contains garbled text and a few URLs, reinforcing the link farm observation. No scripts were extracted from this sample.

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 http://nolimitz.net/uploads/1/3/1/6/131606241/131606241.html#mataste+mi+amor+teodoro+reyes+youtub PDF link annotation
    • http://a1accommodations.org/uploads/1/3/1/3/131383546/jivikenazubos_wanowufex_malugirujubuke_gejifibig.pdfIn PDF document text
    • http://luisruuska.com/uploads/1/3/1/6/131606651/nufodetesafojajex.pdfIn PDF document text
    • http://lynnvogel.com/uploads/1/3/0/3/130324416/2936467.pdfIn PDF document text
    • http://bhavaliapromotions.com/uploads/1/3/1/3/131379866/mubufav_vasegowogas_fukinunobew.pdfIn PDF document text
    • http://katelynblomquist.com/uploads/1/3/0/9/130969144/6451399.pdfIn PDF document text
    • http://jinyuguojiyulecheng.br3h.com/uploads/1/3/0/6/130639192/06ee82c47b8f08.pdfIn PDF document text
    • http://gritcardioclub.com/uploads/1/3/1/6/131636575/119419.pdfIn PDF document text
    • http://michellejoneshealing.com/uploads/1/3/2/3/132302924/kasunavajoxipu_jekixagawad_zelojotoboxuxu_jalipedagudiwa.pdfIn PDF document text
    • http://ucarha.org/uploads/1/3/0/5/130543272/c9f82e73d25e.pdfIn PDF document text
    • http://massage-gamlitz.com/uploads/1/3/1/3/131398489/simomewukabaxigon.pdfIn PDF document text
    • http://kishkoinc.net/uploads/1/3/0/5/130588511/0402911f416.pdfIn PDF document text
    • http://host42.carmichaelnl.com/uploads/1/3/0/7/130739039/nadigovawekudak-lujimevaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fakenigali.files.wordpress.com/2020/06/nerevujis.pdfIn PDF document text
    • https://nifizozege.files.wordpress.com/2020/06/56133957398.pdfIn PDF document text
    • https://tudekasimur.files.wordpress.com/2020/06/wixuxi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000589e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x589E 12100 bytes
SHA-256: 53511a0c7a04d7b93ed42931137f5874deac847bd62cbb2f7ad745e7e576aca2
font_01_sfnt_off00007f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5D 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1

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