Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8549f114abaddd…

MALICIOUS

PDF

45.1 KB Created: 2020-03-28 02:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b424c62db551c878be7478931ba85f88 SHA-1: 3e3d2790bc357d01a7e8eb78af617ffa041c891c SHA-256: 4e8549f114abaddde755dac5a7044755f40be8ff58095ce4d3f63e503942e63e
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a "PDF_SEO_LINK_FARM" heuristic. The document body also contains a link to "descargar proteus 7 portable gratis", suggesting a lure to download software. The numerous external PDF links likely serve to distribute malicious content or manipulate search engine results. 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://baylandesign.net/uploads/1/3/0/4/130489038/130489038.html#descargar+proteus+7+portable+gratis
    • http://petersonskattum.com/uploads/1/3/0/2/130289242/1063997.pdf
    • http://countingwithelliot.com/uploads/1/3/0/6/130639240/wurakukimutoje.pdf
    • http://www.ramsaymusic.com/uploads/1/3/0/2/130287845/positivife-xovozurufeten.pdf
    • http://neworleans-homeinspections.com/uploads/1/3/0/3/130379074/wusojute.pdf
    • http://arbucklelakelodge.com/uploads/1/3/0/7/130775205/3515009.pdf
    • http://candrtitle.com/uploads/1/3/0/8/130874123/nerirotaz.pdf
    • http://www.calmingcareconnectionsllc.com/uploads/1/3/0/2/130289352/posivexuze.pdf
    • http://74-123-77-238.mgwnet.com/uploads/1/3/0/4/130488248/1544892.pdf
    • http://advisorcpr.com/uploads/1/3/0/8/130873828/gagagigewape_wipowugizi_savuwow.pdf
    • http://nwavalanchesolutions.com/uploads/1/3/0/6/130621213/5595119.pdf
    • http://darwinlazatinphotography.com/uploads/1/3/0/7/130775830/3937844.pdf
    • http://liderazgodocente.com/uploads/1/3/0/2/130287314/lidibelewototi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b9.bin
ab05af95b540ec91f5390e4ea72e25c41a5ef35e4fc3e231b19b07a45a8c1ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B9 8456 bytes
font_01_sfnt_off00008803.bin
a1600c79331cba21b3b4a1f056a9d989f02b1280d9db796053b5096bff0b23f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8803 2000 bytes
font_02_sfnt_off00009170.bin
c45ecc3521217a1dc016c14e045d78f78e0d194bf1e1893e402d944f9961a49f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9170 16080 bytes

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