Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9c18e64acea0f3…

MALICIOUS

PDF

46.5 KB Created: 2020-03-21 15:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a15849d80036d29afbeeacae53da20d5 SHA-1: 7b24478e37ee56f78d4d3b0d4672ef23a96b0753 SHA-256: ec9c18e64acea0f35c8962e8af95c03eaacec97e463d3ea6ecf2774510ee9b1f
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external link farm, suggesting a coordinated effort to drive traffic to these sites. The document body, though partially corrupted, contains a URL that appears to be a lure for educational content, likely a pretext for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://bridgestreampublishing.com/uploads/1/3/0/6/130622073/130622073.html#evaluacion+lectoescritura+1o+primaria
    • http://nycogyouth.com/uploads/1/3/0/2/130289784/kazilikomemoner.pdf
    • http://neulip.net/uploads/1/3/0/6/130621545/misujapakobejunulezo.pdf
    • http://nutrimoda.com/uploads/1/3/0/7/130738722/fasinemefenip-duzigaki-sigogikuteboke.pdf
    • http://www.ifonlychild.com/uploads/1/3/0/6/130639791/5411737.pdf
    • http://www.hairwithamy.com/uploads/1/3/0/4/130436147/9eac80e8e2b73.pdf
    • http://boxesandblessings.org/uploads/1/3/0/6/130639990/lidozagajidow.pdf
    • http://khusimart.net/uploads/1/3/0/4/130488181/xokevekixabi.pdf
    • http://runlocal-givelocal.com/uploads/1/3/0/7/130738614/0241091b3dd.pdf
    • http://mail.massoutdoorheritage.org/uploads/1/3/0/8/130813646/d9696ec3.pdf
    • http://wheelhousetournament.com/uploads/1/3/0/6/130639221/wafawojakoga_pidinoxedolet.pdf
    • http://grayscaleconstruction.com/uploads/1/3/0/4/130435571/20fa2fada.pdf
    • http://local-usalocksmith.com/uploads/1/3/0/6/130621057/4311318.pdf
    • http://mancavemountain.com/uploads/1/3/1/0/131069935/2744933.pdf
    • http://jamesorourkelaw.com/uploads/1/3/0/6/130639861/1283403.pdf
    • http://ifthen.club/uploads/1/3/0/6/130639845/negutitukumuwozo.pdf
    • http://hacannabis.com/uploads/1/3/0/6/130639312/tumevizanofesoj.pdf
    • http://oceanstatelocalsports.com/uploads/1/3/0/2/130273978/birililines_folitezomexufa_rubinufew.pdf
    • http://hillingdonprimarycare.net/uploads/1/3/0/9/130969561/069ec6a9.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007494.bin
5f970db0f9b11e1bc72d19f674ee320acb360885a660354e3d4652caa3a7a63e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7494 9664 bytes
font_01_sfnt_off000096b8.bin
313ae97aba67c0290f1f3f711cce73b58f529e1044d09d56103cb5e1641d71c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96B8 16232 bytes

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