Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e21bc1f0c363501…

MALICIOUS

PDF

36.2 KB Created: 2020-03-09 01:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4ce1c1e99d29b17efbcc4f624f2a8363 SHA-1: 9391387e680019c1072df06dd919d9c8281be1bf SHA-256: 0e21bc1f0c363501879d67044ab80d2e5ff16e3decea8a73c495b83dffd809b4
136 Risk Score

Malware Insights

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

This PDF document contains numerous external links, masquerading as information about infant medication dosage, to a link farm of other PDFs. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links were generated programmatically. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://74-123-73-250.mgwnet.com/uploads/1/3/0/5/130588337/130588337.html#infant+vs+children%27s+tylenol+dosage
    • http://corealis-ing.net/uploads/1/3/0/6/130639304/daxujufubodof.pdf
    • http://visionaryshapeshifter.com/uploads/1/3/0/6/130620572/9840829.pdf
    • http://www.grimreaders.com/uploads/1/3/0/6/130604378/lanudirot.pdf
    • http://woodridgefarm.net/uploads/1/3/0/7/130739326/7670564.pdf
    • http://amerineheatingandcooling.com/uploads/1/3/0/7/130740318/9476742.pdf
    • http://www.acutabovelawncare.org/uploads/1/3/0/6/130640028/sonunobibodope.pdf
    • http://modalitiesinstitute.com/uploads/1/3/0/2/130271114/solowaxaf.pdf
    • http://sunsteellogistics.com/uploads/1/3/0/4/130483279/c3be8cd5f8a16f.pdf
    • http://iamjennatorres.com/uploads/1/3/0/9/130969891/3778820.pdf
    • http://ladydi.biz/uploads/1/3/0/4/130483045/5962472.pdf
    • http://ontariocaairporthotel.com/uploads/1/3/0/5/130539479/fffa7.pdf
    • http://iloapp.rocqawali.com/uploads/1/3/0/6/130620673/1751755.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a9.bin
ee4b06d242d3dc797b8cf2d5173eb26ed9562780165ff051924214978f1b155c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A9 8720 bytes

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