Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad20e43b96cf9187…

MALICIOUS

PDF

44.8 KB Authoring application: Karbon
MD5: 2b6f1b1b43d988584d7965adaa117de0 SHA-1: a3cd75421e5d74ff56fb136b4c7fae88ff6fc507 SHA-256: ad20e43b96cf9187aee00739db1f8e69371bcf44633caaa197058d7f1f5a79b4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing distribution mechanism. ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious classification. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body contained mostly garbled text.

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://start-right.us/uploads/1/3/0/8/130814933/4349958371e35bb.pdf
    • http://andersonmobilehomepark.com/uploads/1/3/0/5/130546000/volafiratano.pdf
    • http://coach.asansmartschool.com/uploads/1/3/0/6/130622009/c33135cb54ed3c9.pdf
    • http://mta-sts.dc-f8f19dc8.frenchcreekdesign.com/uploads/1/3/0/7/130739348/modazadadod-wexama-rakokaminerenuf.pdf
    • http://trevordewitt.com/uploads/1/3/0/5/130588806/2c4e18cf45bb.pdf
    • http://www.asialink.partners/uploads/1/3/0/5/130551132/9ddb8affb819af.pdf
    • http://dkdesignnh.com/uploads/1/3/0/4/130488584/dijoloxefuni.pdf
    • http://butterflynette.com/uploads/1/3/0/4/130489025/suwen_pavoxu_tajaxujol.pdf
    • http://allenharvey.com/uploads/1/3/0/4/130488993/tinab.pdf
    • http://cancercoloring.com/uploads/1/3/0/6/130622058/737481.pdf
    • http://lgcpressurewashingservice.com/uploads/1/3/0/9/130969311/tajikosororat.pdf
    • http://newbusinessdevelopment.net/uploads/1/3/0/6/130621864/bivuzosatafolo-vapixo-xemuranafuku.pdf
    • http://twomachines.org/uploads/1/3/0/5/130550912/8641571.pdf
    • http://74-123-75-167.mgwnet.com/uploads/1/3/1/0/131070314/67e92883fc230ed.pdf
    • http://dominicbercier.com/uploads/1/3/0/7/130775842/xawekajizoj.pdf
    • http://49coles.com/uploads/1/3/0/7/130739509/maxizatimuvuja_resapipabev_luliziluf.pdf
    • http://persistress.org/uploads/1/3/0/5/130588672/pukiwejupasulam-generaxax.pdf
    • http://www.littleblessingsofanoka.com/uploads/1/3/0/7/130739769/b2580f.pdf
    • http://autodiscover.coprimag.com/uploads/1/3/0/4/130476818/130476818.html#o+holy+night+adolphe+charles+adam+lyrics

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000418e.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x418E 2652 bytes
font_01_sfnt_off00004e1b.bin
9d38be447e4eb8616aeb83f102edcd7f3523ebc17ab170e4ff8481a28137b1f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1B 9924 bytes

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