Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9d8a50a6c5e3f9…

MALICIOUS

PDF

38.7 KB Created: 2020-07-04 00:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ade1ef366f729eda74f84f59fbc97e SHA-1: e74e0d85145e617cb43a38ba4c9c5cf3fc0d9014 SHA-256: fa9d8a50a6c5e3f9623b79f183cf4e3c69a8972a1b0882db0959948984b387e7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it's designed to redirect users to malicious content. The ML_NYX_PDF_MALICIOUS heuristic further supports its malicious nature. The document body, though partially obfuscated, contains several URLs that are also listed in the extracted URLs, reinforcing the link farm attack pattern. 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://files.alphlukaupartners.com/uploads/1/3/0/3/130323593/130323593.html#carousel+viewpager+android+github
    • http://designsbyelianah.com/uploads/1/3/0/7/130775522/045b0fc127.pdf
    • http://stiryourinnerchef.com/uploads/1/3/1/3/131382539/kiwumiriwudi.pdf
    • http://files.kravmagamacao.com/uploads/1/3/0/5/130588999/petetipodibeso_tenuwolevuteva_vemajetij.pdf
    • http://tishmasciarelli.com/uploads/1/3/0/6/130605435/4da35a2768.pdf
    • http://ruiwang.us/uploads/1/3/0/4/130483074/44285b06c23d9ed.pdf
    • http://new-york.letenky-sky.sk/uploads/1/3/0/7/130740265/79284c951b92831.pdf
    • http://files.bartlettartdepartment.com/uploads/1/3/0/5/130588574/51158333837e3.pdf
    • http://trsorgiveaways.com/uploads/1/3/1/8/131856022/691596.pdf
    • http://files.spinnakerspiritualdirection.com/uploads/1/3/1/4/131483078/6914228.pdf
    • http://webdisk.myelegantmarriage.com/uploads/1/3/1/4/131408153/eae44c.pdf
    • http://highly-reviewed.com/uploads/1/3/0/4/130436050/vuzuwadoj.pdf
    • http://www.codexpedia.com/android/android-carousel-view-using-viewpager/
    • https://dukefemegol372789639.files.wordpress.com/2020/06/vewoverezoz.pdf
    • https://binudekuteni.files.wordpress.com/2020/06/12820736602.pdf
    • https://xabofufutin.files.wordpress.com/2020/06/50821048358.pdf
    • https://lumozipezu858735365.files.wordpress.com/2020/06/vilozitemebufukazo.pdf
    • https://fovesef.files.wordpress.com/2020/06/9969556513.pdf
    • https://jerurig.files.wordpress.com/2020/06/gisujuxudifozonubada.pdf
    • https://bebeleg.files.wordpress.com/2020/06/gutekojenukowuvemikake.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_off00005790.bin
e89ada7db72000d66384e6809f7234c884cc5bb9d1484fdbfad1f617201ca5eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5790 5420 bytes
font_01_sfnt_off00006a04.bin
ec13484559751c15bc94302a3b3663f8dd9c704779c145708390b1a21d69899d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A04 10584 bytes

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