Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4254fa048b09d3…

MALICIOUS

PDF

37.1 KB Created: 2020-04-11 07:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 074d04a0907199390cdb39b7e8f29905 SHA-1: 1aabb6fcf816cd7253bdb9812c5514d6dd881beb SHA-256: 3f4254fa048b09d36b3e6d54968c50f2635f95f1c2ba75792d178a50b54a6a07
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection mechanism. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample, but the extensive use of external links indicates a likely attempt to direct users to malicious websites or to manipulate search engine results.

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://74-123-75-90.mgwnet.com/uploads/1/3/0/4/130483368/130483368.html#keys+to+drawing+epub
    • http://officialbluehangers.com/uploads/1/3/0/3/130323185/dozukodunedesakavaru.pdf
    • http://crownerknives.us/uploads/1/3/0/6/130605406/mukim.pdf
    • http://partvault.com/uploads/1/3/0/7/130775371/bukesikatowarazil.pdf
    • http://prometheanconcepts.net/uploads/1/3/0/8/130873732/c0470b59.pdf
    • http://austincomputerrepair.net/uploads/1/3/1/4/131406253/2648684.pdf
    • http://ecsdoubledownraceway.com/uploads/1/3/0/4/130477351/910728d364c2be.pdf
    • http://batterycfosummit.com/uploads/1/3/1/0/131071035/8976746.pdf
    • http://carllittlelaw.com/uploads/1/3/1/4/131438312/7853637.pdf
    • http://gloriouskitchen.net/uploads/1/3/1/3/131379612/5107dfacb33d.pdf
    • http://bodyfixremedialsportmassage.com/uploads/1/3/1/0/131070125/7372747.pdf
    • http://hostmaster.wheretogowild.com/uploads/1/3/1/3/131381433/2204e47ad86b7.pdf
    • http://laurikerns.com/uploads/1/3/0/7/130739775/25839b30ce7.pdf
    • http://woman-empower-yourself.com/uploads/1/3/0/6/130605291/1228976.pdf
    • http://myenhancedbeautyy.net/uploads/1/3/0/6/130605278/1578668.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_off00006b9c.bin
03c34ea9b9b34ac73c1aa6bad6aeb5e7335425b2b43e40899bb1376ebc2dd329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9C 7332 bytes

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