Malicious PDF — malware analysis report

Static analysis result for SHA-256 7168bebc88651983…

MALICIOUS

PDF

45.3 KB Created: 2020-03-26 05:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 40139264bcb65599148e826f450bc03b SHA-1: 28c239edd5b1cebdd5ddb409164711b32ce76ef0 SHA-256: 7168bebc88651983823879a7716b2b3ee61db72daa45c0790b6afbb446b5c4db
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links to external websites, many of which appear to be part of a link farm designed to obscure malicious activity. The document body, though corrupted, contains text suggesting a financial tool lure, which is likely a pretext to drive users to these malicious URLs. The ML classifier strongly indicates malicious intent.

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://meshayla.com/uploads/1/3/0/7/130776518/130776518.html#planilla+excel+para+calcular+van+y+tir PDF link annotation
    • http://galhaur.com/uploads/1/3/0/4/130435962/werar.pdfIn PDF document text
    • http://bajalife.com/uploads/1/3/0/5/130545885/xubugafuri.pdfIn PDF document text
    • http://oneskylane.net/uploads/1/3/0/6/130604639/9454535.pdfIn PDF document text
    • http://katdar.net/uploads/1/3/0/6/130639305/7855cf.pdfIn PDF document text
    • http://calligraphy-corner.com/uploads/1/3/0/5/130588499/89f1288f28e98.pdfIn PDF document text
    • http://airstreamflying-cloud19cb.net/uploads/1/3/0/4/130483303/nekemi.pdfIn PDF document text
    • http://handtherapy.online/uploads/1/3/0/4/130483879/birugoxokitawal.pdfIn PDF document text
    • http://eleancia.com/uploads/1/3/0/6/130621480/1336864.pdfIn PDF document text
    • http://www.wareshoals.org/uploads/1/3/0/5/130543386/882a0a.pdfIn PDF document text
    • http://juderus.com/uploads/1/3/0/5/130539718/fb0248ac29.pdfIn PDF document text
    • http://controlbydesignsrq.com/uploads/1/3/0/2/130287445/niduguzofu.pdfIn PDF document text
    • http://michaelsautodetailing.com/uploads/1/3/0/9/130969057/nemaroruwitulupadid.pdfIn PDF document text
    • http://www.genevievewilson.co/uploads/1/3/0/6/130605432/2858497.pdfIn PDF document text
    • http://gpdisigns.com/uploads/1/3/0/6/130604557/nupibibosanoveseguxo.pdfIn PDF document text
    • http://madelynrosephoto.com/uploads/1/3/0/7/130776074/4f3f150f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A2 8816 bytes
SHA-256: dea9905100dce02b8bee5357025ae091013750f4dc0e2eddeccaef4ff492d55a
font_01_sfnt_off000088b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B7 2628 bytes
SHA-256: 2e0d6281891bd9bd2719a61e260300a7d87bd62bfd1c80e29c658e39d626dd30
font_02_sfnt_off00009200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9200 16060 bytes
SHA-256: 40a403f8312ff9c93041e514e965a4d57d797ba541f1da729710ef172887bfc2

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