Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed00d92e7d8b9080…

MALICIOUS

PDF

117.6 KB Created: 2020-04-18 21:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 00c15a1524f0feec76113d85e9494df8 SHA-1: 5fadd67be0c74f0c2d23cf18e5991c53ce9bae36 SHA-256: ed00d92e7d8b9080937dd9a0637637657a6848d5eb1e5b5f5c5152ceb19762a7
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, many of which point to other PDF files with numeric slugs, indicating a link farm for SEO manipulation. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'happy birthday wishes'. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://souniquelyhuman.com/uploads/1/3/0/5/130546243/130546243.html#happy+birthday+wishes+in+marathi+video
    • http://ccrwelding.com/uploads/1/3/0/5/130588205/9930824.pdf
    • http://bellytimetravels.com/uploads/1/3/0/7/130738896/1efaa.pdf
    • http://gwc-team35.org/uploads/1/3/0/4/130483219/dadavebojiribexaj.pdf
    • http://ifabroad.com/uploads/1/3/0/8/130814535/5287994.pdf
    • http://cwdahlart.com/uploads/1/3/1/3/131398069/7444405.pdf
    • http://givebackmountain.com/uploads/1/3/0/4/130435641/fenomax.pdf
    • http://amiesattic.com/uploads/1/3/0/2/130289519/nodatuginivitorobu.pdf
    • http://kraimgroup.com/uploads/1/3/1/3/131398385/bopuvizinoro-fizukoxoruzozi.pdf
    • http://cleanwindows4you.com/uploads/1/3/1/3/131383981/dimude.pdf
    • http://elaineyamamoto.ca/uploads/1/3/1/6/131606822/xizav.pdf
    • http://danviet-consult.com/uploads/1/3/0/3/130313436/4165284.pdf
    • http://thechubbygirlbellydances.com/uploads/1/3/0/5/130550880/fuvaregeva.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124dd.bin
0b5e6ab6ccc5392c140ffe9cf945a20da04ec592b42dfecdf941f5b9749a1a6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124DD 6592 bytes
font_01_sfnt_off0001351e.bin
d93c00e47f7f769aea1846ffbf6b1691b704e953195520afa2282c2c0840f70e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1351E 9088 bytes
font_02_sfnt_off000157e9.bin
1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157E9 1388 bytes
font_03_sfnt_off00015f83.bin
b55b33d8749c76479ac7dfd7ab54ddbd8edced54a03d6b2dd28512617b09b047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F83 6020 bytes
font_04_sfnt_off0001741f.bin
504482f6bbcebeacc118bec4ae5d02e7fbcc395e2a64ccdf8d5cde182fa48060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1741F 16908 bytes
font_05_sfnt_off00018ba4.bin
005ed3fb2a12773c6b249fffa4654e6abd9bc641c852be1686b2eac12fb6deb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18BA4 21516 bytes

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