Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b7996bdd0269d3…

MALICIOUS

PDF

45.4 KB Authoring application: ImageMagick
MD5: 32cf8dfbbf1e5d1da1571c23e3342e29 SHA-1: 6708b3b132d4f232e8eee63e480409f02df9c767 SHA-256: 51b7996bdd0269d356da207cf0fb4a243d412d52404b1fe93954d81f3ec9d07d
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, forming a link farm. The heuristic PDF_SEO_LINK_FARM indicates these links are likely intended to direct users to malicious content, potentially for phishing or malware downloads. ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious classification. The ML classifier also strongly flagged this PDF as malicious.

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.
  • 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://spiritjourney.org/uploads/1/3/0/3/130323156/dejawa.pdf
    • http://waterhallcollection.co.uk/uploads/1/3/0/6/130620701/8183530.pdf
    • https://kipekuxawu.weebly.com/uploads/1/3/0/6/130604524/sexelamaka-fikavitifujex-jepetut-kemozoxejaso.pdf
    • https://riduroral.weebly.com/uploads/1/3/0/4/130488165/durulitamom.pdf
    • http://musicbandtogether.com/uploads/1/3/0/2/130272280/garimesi.pdf
    • http://cassusblog.com/uploads/1/3/0/2/130271072/9282203.pdf
    • http://newhopeakron.com/uploads/1/3/0/4/130483295/pufenuzimepumof-rutajujedonuke-giteburin-rinixuni.pdf
    • http://instagramhelpingcenters.com/uploads/2020/01/28/jutafidemibivo_fipasepox.pdf
    • http://ssvfcpc.org/uploads/1/3/0/3/130323672/suvowisutodoza.pdf
    • http://pruritusresearch.net/uploads/1/3/0/4/130436165/noxar_pajevavol.pdf
    • http://raystreetphotography.com/uploads/1/3/0/6/130605501/8053821.pdf
    • http://allergy.mediutopia.com/uploads/1/3/0/6/130621643/130621643.html#serous+otitis+media+treatment+guidelines

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000151c.bin
10b067b3e637fcc8ed1992200e5a86056d6b65df86beb80d0103c21b0d648a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151C 8408 bytes
font_01_sfnt_off00006b67.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B67 16036 bytes

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