Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5bd281ca08e6e2…

MALICIOUS

PDF

38.1 KB Authoring application: Solid Converter PDF
MD5: 2808a6032ef82ec98b6e4bb042cbf9ac SHA-1: 1438ad7e594b546824f5220f49b59a5df0ca9532 SHA-256: 1d5bd281ca08e6e21830d75b9cdbe20f61d584fc98027d5ff218a8c240683e40
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious classification. The document body itself is heavily obfuscated and contains some of the URLs, but does not provide clear user-facing 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://carsforfood.com/uploads/1/3/0/3/130324440/revinini-mosakonigenufit-lawugomi.pdf
    • http://russelljburns.com/uploads/1/3/0/2/130273571/xafivapit.pdf
    • http://hostmaster.ivanbeghelli.it/uploads/1/3/0/6/130621973/jarofefavadu.pdf
    • http://lhs98.com/uploads/1/3/0/5/130590159/1005940.pdf
    • http://iboyinteractive.com/uploads/1/3/0/3/130323216/974379.pdf
    • http://qor.kz/uploads/1/3/0/2/130288481/209845.pdf
    • http://imaginationbydesign.net/uploads/1/3/0/6/130621208/b0bfe.pdf
    • http://www.atlfoodista.com/uploads/1/3/0/3/130379307/wonekiwizebefizoda.pdf
    • http://wordpressdevelopmentnewyork.com/uploads/1/3/0/3/130324385/putekevi-tebopidabuk-bebikuxikaz.pdf
    • http://emperinghamconsultinginc.com/uploads/1/3/0/5/130543653/mafetofagemorafefu.pdf
    • http://ibeatbeilue.com/uploads/1/3/0/2/130287973/xolepo-fadamaju-zisema-dadiwij.pdf
    • http://paul-melton.net/uploads/1/3/0/7/130776043/sativowafudikefiwum.pdf
    • http://tigregatto.com/uploads/1/3/0/4/130488414/rariwos.pdf
    • http://www.vincenzopezelladedalus.com/uploads/1/3/0/9/130969065/samufenosux.pdf
    • http://www.dhkcoinappraiser.com/uploads/1/3/0/7/130775744/tozen.pdf
    • http://premierife.com/uploads/1/3/0/3/130323157/bb16b5.pdf
    • http://northamericancontinent.com/uploads/1/3/0/4/130476691/4040466.pdf
    • http://remarkhmc.com/uploads/1/3/0/3/130313755/weneguvoxijabil.pdf
    • http://boreaslogistics.com/uploads/1/3/0/5/130590545/wafamokev.pdf
    • http://eazydev.com/uploads/1/3/0/3/130379204/1b05f87541fd.pdf
    • http://www.sweetjosieshomemadetreats.com/uploads/1/3/0/5/130550972/2c5e9b1bb0670.pdf
    • http://subarucrosstrek.info/uploads/1/3/0/4/130435679/5558718.pdf
    • http://74-123-73-172.mgwnet.com/uploads/1/3/0/3/130323707/130323707.html#words+to+describe+negative+personality+traits
    • http://remarkhmc.com/uploads/1/3/0/3/130313755/weneguvoxijabil.pd

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003395.bin
1a79c4ce44f9d6626d1f559ff1938004276a09980fb403fdf88e47248daa409a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3395 7900 bytes

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