Malicious PDF — malware analysis report

Static analysis result for SHA-256 987f71a0df9e5084…

MALICIOUS

PDF

38.1 KB Created: 2020-04-02 03:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 497643fa15f9da7b82d2934fbf97f8f8 SHA-1: 22f3d9311e17452fdc7cf08fd757959b0fb53faf SHA-256: 987f71a0df9e5084c80f78837a60b822a8aaaed10572037ea773663b13f586aa
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a likely attempt to drive traffic to a network of related domains. No scripts were extracted, and the document body is largely unreadable, but the presence of numerous external links strongly suggests a malicious intent related to web traffic redirection or content delivery.

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://youbrewchicago.com/uploads/1/3/0/4/130483869/130483869.html#ejemplos+de+metatesis+reciproca PDF link annotation
    • http://lonestarrealestateschool.com/uploads/1/3/0/4/130436399/e0a5fe41b.pdfIn PDF document text
    • http://showready.info/uploads/1/3/0/6/130639936/rifafopabigubimisif.pdfIn PDF document text
    • http://harnischart.com/uploads/1/3/0/5/130544090/zegujukop_tosikaruzakodag_dagesiroz_fukax.pdfIn PDF document text
    • http://victoriagernertdott.com/uploads/1/3/0/4/130483542/numemogupaxo.pdfIn PDF document text
    • http://introtothegoodlife.com/uploads/1/3/0/8/130813428/vipexu_malam_zesus_fexaref.pdfIn PDF document text
    • http://maislimpeza.com/uploads/1/3/1/3/131383586/vulemi.pdfIn PDF document text
    • http://bowsforpros.com/uploads/1/3/1/3/131384017/volozemovoz.pdfIn PDF document text
    • http://grupoleyan.com/uploads/1/3/0/7/130738593/bfe7c60.pdfIn PDF document text
    • http://harlowridgefarm.com/uploads/1/3/0/2/130288630/wimogaxalev.pdfIn PDF document text
    • http://heerlijkharen.nl/uploads/1/3/0/6/130621524/4f922874.pdfIn PDF document text
    • http://truemedtecnologiaemsaude.com/uploads/1/3/0/4/130435601/mowojabode-jilubopa.pdfIn PDF document text
    • http://skycoinfiber.com/uploads/1/3/1/0/131070336/vofige_zebiroja_fometuli_ribopep.pdfIn PDF document text
    • http://insightmusicstudio.com/uploads/1/3/0/2/130289703/6812024.pdfIn PDF document text
    • http://allabouthenry.com/uploads/1/3/0/9/130969448/3450016.pdfIn PDF document text
    • http://macauleyconstruction.com/uploads/1/3/0/7/130739944/ad25a7.pdfIn PDF document text
    • http://whatshottaccessories.com/uploads/1/3/0/6/130621552/4654064.pdfIn PDF document text
    • http://portal.paymentsmd.com/uploads/1/3/0/8/130874122/jufigopukisu_bemorenikituvuw_lefilib_sovivevever.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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9F 8168 bytes
SHA-256: bdbe20cd0e714c594e22015d42c868da47b22988f23d56014f9d25f88d848437

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