Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cfe9f8054e62e9…

MALICIOUS

PDF

34.6 KB Created: 2020-06-06 02:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c87c0b1eb08d93699c2ef50caea94f SHA-1: 4d906a8f70176f0dfe38d07c82a125b991e22577 SHA-256: 54cfe9f8054e62e95d7794ec16a95708b9b501ca4147e25c4aee8779d91767f8
96 Risk Score

Malware Insights

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

The PDF document was flagged by an ML classifier with high confidence. It contains a large number of external links, many of which point to domains that appear to be part of a link farm. This suggests the primary purpose is SEO spam or to lure users to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://quranicacademy.net/uploads/1/3/0/2/130289792/130289792.html#les+objets+d%2527autrefois+cp
    • http://texazcatering.com/uploads/1/3/0/6/130621137/8274171.pdf
    • http://anywarefx.com/uploads/1/3/0/4/130489800/c86797.pdf
    • http://ns1.borzoigift.com/uploads/1/3/1/4/131437363/4853b99f1cca7e2.pdf
    • http://lixfood.com/uploads/1/3/0/7/130739802/2483760.pdf
    • http://bandshesmusic.com/uploads/1/3/1/1/131164435/fef183714.pdf
    • http://newearthcollaborative.net/uploads/1/3/0/7/130775831/4696703.pdf
    • http://astoriabookspress.com/uploads/1/3/0/4/130436095/xobonegajixorag.pdf
    • http://owens-for-mayor.com/uploads/1/3/0/8/130815115/2134722.pdf
    • http://justseemybike.com/uploads/1/3/0/9/130969429/aadd2a8a19.pdf
    • http://quranicacademy.net/uploads/1/3/0/2/130289792/terms.html
    • http://quranicacademy.net/uploads/1/3/0/2/130289792/dmca.html
    • http://quranicacademy.net/uploads/1/3/0/2/130289792/policy.html
    • https://zegekodejove.files.wordpress.com/2020/06/46204966873.pdf
    • https://foxiwewuko651150165.files.wordpress.com/2020/06/16510139604.pdf
    • https://woraletavaj.files.wordpress.com/2020/06/vakumosutedox.pdf
    • http://iicop.iri.columbia.edu/uploads/1/3/0/5/130589132/kujes.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_off0000596d.bin
dc6d391871d96e121bb3681add0fb31c4fc155f654d2f797475b89aa45d5ac34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x596D 11380 bytes

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