Malicious PDF — malware analysis report

Static analysis result for SHA-256 4511061db41efea7…

MALICIOUS

PDF

35.2 KB Authoring application: Karbon
MD5: a1db5314887e0921900306929f4473d0 SHA-1: 0053aa536d311c0836ec6f80f0bf673164cd2607 SHA-256: 4511061db41efea793ca82cd8ed54d0b9f9c66cc09326dba5863dd2531104cdd
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a large number of embedded external PDF links. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest a link farm designed to redirect users to potentially malicious content, consistent with phishing or malware distribution campaigns. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://mta-sts.mail.crystalscrystalsks.com/uploads/1/3/0/6/130605115/fogosepujezumal.pdf
    • http://www.jbgreatday.com/uploads/1/3/0/4/130483087/47d14.pdf
    • http://ninejazz.com/uploads/1/3/0/8/130814241/77a6536128e.pdf
    • http://smithscateringholbrook.com/uploads/1/3/0/6/130621383/mawoxebaf.pdf
    • http://lakefieldbaptistchurch.org/uploads/1/3/0/5/130543063/0011269e.pdf
    • http://dreamforacure.org/uploads/1/3/0/7/130739750/xovenefegatumagori.pdf
    • http://www.happymothersdayloveaustin.com/uploads/1/3/0/8/130814127/fotolitabopijekutaba.pdf
    • http://beachumbrellarental.com/uploads/1/3/0/4/130476389/fcb1c338c18794.pdf
    • http://thesunsetswithoutyou.com/uploads/1/3/0/2/130291544/bizimed.pdf
    • http://mollybooth.com/uploads/1/3/0/2/130291453/c9c18.pdf
    • http://mitchellstreetbusinesssuites.com/uploads/1/3/0/6/130639561/mixosenolovub.pdf
    • http://netoaterro.com/uploads/1/3/0/7/130776509/rezanoles.pdf
    • http://nationalarchivesphotographer.com/uploads/1/3/0/4/130477882/8684066.pdf
    • http://nuzzdos.com/uploads/1/3/0/4/130478484/rukejowogoruvukedine.pdf
    • http://sacasta.voyagerwebsites.com/uploads/1/3/0/4/130479472/130479472.html#on+the+reproduction+of+capitalism+ideology+and+ideological+state+apparatuses+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001b85.bin
df8a86524d3696b1884f5b6e79c12b392678e00594b34ed95db870281efadef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B85 7696 bytes
font_01_sfnt_off000035d8.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35D8 16036 bytes

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