Malicious PDF — malware analysis report

Static analysis result for SHA-256 100208508c698958…

MALICIOUS

PDF

39.6 KB Created: 2020-06-07 03:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3006175fff36a1ca08798aff7cea617 SHA-1: 877e36dab9b6df7893fc163c41833ecf38b6f508 SHA-256: 100208508c698958c81540b06786ba3c4804c798c78bd928522cc977e7439a85
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external sites. The 'PDF_SEO_LINK_FARM' heuristic indicates a high volume of such links, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://kardio-privat.com/uploads/1/3/1/3/131384412/131384412.html#guilty+all+the+same+lyrics
    • http://carkweens.com/uploads/1/3/1/0/131070805/kubuk.pdf
    • http://thisisblacklung.co.uk/uploads/1/3/1/6/131637854/rijulikipi.pdf
    • http://jllamericasgis.com/uploads/1/3/1/3/131381799/fojenadoniju.pdf
    • http://windwardbc.com/uploads/1/3/1/4/131483112/povukivopezigid.pdf
    • http://summitserviceslv.com/uploads/1/3/0/6/130603698/wedilonaf.pdf
    • http://trend-bags.net/uploads/1/3/0/4/130476624/puxitatarinigor_ripepena_nadoxanomisa.pdf
    • http://personaltrainer-oldenburg-rob.de/uploads/1/3/1/3/131384573/b1587fbd54.pdf
    • http://hostmaster.tek-73.co.uk/uploads/1/3/0/3/130313081/tagetoxufuw_nemeral.pdf
    • http://trendz-lovers.com/uploads/1/3/0/9/130969026/badopuvag-medasikikoki.pdf
    • http://southernforestshoney.com/uploads/1/3/0/9/130969920/9851797.pdf
    • http://icwakanda.com/uploads/1/3/1/3/131379384/kolinujuxubebam-fupebevip-lutozenofimeze-lamad.pdf
    • http://brincolindo.com/uploads/1/3/0/7/130775701/2784689.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fukoboseniki.files.wordpress.com/2020/06/27179087852.pdf
    • https://kurugavot.files.wordpress.com/2020/06/73195334747.pdf
    • https://wilewivim.files.wordpress.com/2020/06/89772693183.pdf
    • https://basokegutig.files.wordpress.com/2020/06/lugeduk.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f82.bin
be59a43ec8309a7aa421c7ddb823913e419f960aeb5217c72d639eafd5c26254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F82 10380 bytes

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